| Acronym | Meaning |
| IA | I Agree |
| IAB | I Am Bored |
| IABW | In A Bad Way |
| IAC | In Any Case |
| IAD | It All Depends |
| IAE | In Any Event |
| IAG | It’s All Good |
| IAK | I Already Know |
| IAL | I Ain’t Laughing I Actually Laughed |
| IALTO | I Always Love That One |
| IAMA | I Am Mildly Amused |
| IANAD | I Am Not A Doctor |
| IANAL | I Am Not A Lawyer (this is an uninformed opinion) |
| IAS | In A Second |
| IAU | I Adore You |
| IAW | In Accordance With I Agree With |
| IAWTC | I Agree With That/This Comment |
| IAWTCSM | I Agree With This Comment So Much |
| IAWTP | I Agree With This Post |
| IAY | I Adore You |
| IB | I’m Back |
| IB2D | I Beg To Differ |
| IB4TL | In Before The Lock |
| IBAN | International Bank Account Number |
| IBB | I’ll Be Back |
| IBK | Idiot Behind Keyboard |
| IBL | In Before Lock |
| IBM | International Business Machines |
| IBMTS | I’ve Been Meaning To Say |
| IBS | Irritable Bowel Syndrome |
| IBTD | In Before The Delete I Beg To Differ |
| IBTL | In Before the Lock |
| IBUWU | I’m Breaking Up With You |
| IBW | I’ll Be Waiting |
| IBYP | I Beg Your Pardon |
| ICAM | I Couldn’t Agree More |
| ICAY | I Care About You |
| ICB | I Can’t Believe… |
| ICBB | I Can’t Be Bothered |
| ICBI | I Can’t Believe It |
| ICBINB | I Can’t Believe It’s Not Butter |
| ICBM | Intercontinental Ballistic Missile |
| ICBSST | I Can’t Believe She Said That |
| ICBW | It Could Be Worse |
| ICC | Ice Crown Citadel ( ) |
| ICCL | I Couldn’t Care Less |
| ICR | I Can’t Remember |
| ICSL | I Couldn’t/Can’t Stop Laughing |
| ICSTAY | I Can’t Stop Thinking About You |
| ICT | Information and Communication Technology |
| ICU | Intensive Care Unit I See You |
| ICW | In Connection With I Can’t Wait |
| ICYDK | In Case You Didn’t Know |
| ICYMI | In Case You Missed It |
| IDBI | I Don’t Believe It |
| IDBY | I Don’t Believe You |
| IDC | I Don’t Care |
| IDE | Integrated Development Environment Integrated Device Electronics |
| IDEC | I Don’t Even Care |
| IDEK | I Don’t Even Know |
| IDEKY | I Don’t Even Know You |
| IDEWTK | I Don’t Even Want To Know |
| IDFG | I Don’t Feel Good |
| IDFLI | I Don’t Feel Like It |
| IDGAD | I Don’t Give A Damn |
| IDGHP | I Don’t Get Hashtag Phrases I Don’t Get His/Her Point I Don’t Generally Hate People |
| IDGI | I Don’t Get It |
| IDHAC | I Don’t Have A Clue |
| IDHTT | I Don’t Have The Time |
| IDI | I Doubt It |
| IDJ | I Don’t Judge |
| IDK | I Don’t Know |
| IDKE | I Don’t Know Either |
| IDKW | I Don’t Know Why |
| IDKWTD | I Don’t Know What To Do |
| IDKWYM | I Don’t Know What You Mean |
| IDKY | I Don’t Know Why |
| IDL | I Don’t Like … |
| IDLI | I Don’t Like It |
| IDLT | I Don’t Like That |
| IDLY | I Don’t Love/Like You |
| IDM | It Doesn’t Matter Intelligent Dance Music |
| IDK | I Don’t Know |
| IDNK | I Do Not Know |
| IDR | I Don’t Remember |
| IDRC | I Don’t Really Care |
| IDRK | I Don’t Really Know |
| IDST | If Destroyed, Still True |
| IDT | I Don’t Think |
| IDTS | I Don’t Think So |
| IDU | I Don’t Understand |
| IDUNNO | I Don’t Know |
| IDW | I Don’t Want |
| IDWK | I Don’t Wanna Know |
| IDWT | I Don’t Want To |
| IDWTAI | I Don’t Wanna Talk About It |
| IDWTK | I Don’t Want to Know |
| IE | Id Est (that is) Internet Explorer |
| IED | Improvised Explosive Device |
| IEEE | Institute of Electrical and Electronics Engineers |
| IEP | Individualized Education Program |
| IFM | In Fond Memory |
| IGI | I Get It |
| IGM | I Got Mine |
| IGMC | I’ll Get My Coat |
| IGN | In Game Name |
| IGNB | I’m Going Now, Bye |
| IGNTS | I’ve Got Nothing To Say |
| IGS | I Guess So |
| IGTG | I Got To Go |
| IGU | I Give Up |
| IGWT | In God We Trust |
| IGY | I Get You |
| IGYB | I’ve Got Your Back |
| IH8U | I Hate You |
| IHAC | I Have A Customer… |
| IHDK | I Honestly Don’t Know |
| IHM | I Hate Mondays |
| IHML | I Hate My Life |
| IHNC | I Have No Clue |
| IHNI | I Have No Idea |
| IHO | In Honor Of |
| IHOP | International House of Pancakes |
| IHP | I Hate People |
| IHS | I Hope So |
| IHT | I Hate This |
| IHY | I Hate You |
| IHYDM | I Hope You Don’t Mind |
| IHYSM | I Hate You So Much |
| IIB | Ignorance Is Bliss |
| IIFYM | If It Fits Your Macros |
| IIH | If I’m Honest |
| IIL | I’m In Love |
| IINM | If I’m Not Mistaken |
| IIR | Idiot In Room |
| IIRC | If I Remember Correctly |
| IIS | Internet Information Services |
| IITUWUTMAS | If I Tell You Will You Tell Me A Secret? |
| IITWI | In It To Win It |
| IITYWIMIWHTKY | If I Tell You What It Means I Will Have to Kill You |
| IITYWTMWYBMAD | If I Tell You What This Means Will You Buy Me a Drink? |
| IITYWTMWYKM | If I Tell You What This Means Will You Kiss Me? |
| IITYWYBMAD | If I Tell You Will You Buy Me A Drink |
| IIUC | If I Understand Correctly |
| IIWII | It Is What It Is |
| IIWY | If I Were You |
| IJ | I’m Joking |
| IJAF | It’s Just A Fact |
| IJDK | I Just Don’t Know |
| IJG | I Just Giggled |
| IJK | I’m Just kidding |
| IJL | I Just Laughed |
| IJS | I’m Just Saying |
| IJWTK | I Just Want To Know |
| IJWTS | I Just Want To Say |
| IK | I Know |
| IKH | I Know, Huh? |
| IKHYF | I Know How You Feel |
| IKLY | I Kinda Like You |
| IKM | I Know Man |
| IKMTY | I Know More Than You |
| IKN | I Know Not |
| IKR | I Know, Right |
| IKT | I Knew That |
| IKTF | I Know The Feeling |
| IKTR | I Know That’s Right |
| IKWUM | I Know What You Mean |
| IKWYDLS | I Know What You Did Last Summer |
| IKWYL | I Know Where You Live |
| IKWYM | I Know What You Mean |
| IKY | I Know You |
| IKYP | I’ll Keep You Posted |
| IL | In Love |
| ILD | Ich Liebe Dich (I Love You) |
| ILH | I Love Him/Her |
| ILI | I Love It |
| ILM | I lige m |
| ILML | I Love My Life |
| ILMO | In Loving Memory Of |
| ILNY | I Love New York |
| ILS | Inflated Lat Syndrome |
| ILT | I Like That |
| ILY | I Love You |
| ILY2 | I Love You Too |
| ILYA | I Love You All |
| ILYAAF | I Love You As A Friend |
| ILYAM | I Love You As a Mate |
| ILYB | I Love You Both |
| ILYF | I’ll Love You Forever |
| ILYG | I Love You Guys/Girls |
| ILYK | I’ll Let You Know |
| ILYL | I Love You Lots |
| ILYLAS | I Love You Like A Sister |
| ILYLT | I Love You Long Time |
| ILYM | I Love You More |
| ILYSDM | I Love You So Damn Much |
| ILYSM | I Love You So Much |
| ILYSMB | I Love You So Much Baby |
| ILYSMM | I Love You So Much More |
| ILYT | I Love You Too |
| ILYTB | I Love You To Bits |
| ILYVM | I Love You Very Much |
| ILYWAMH | I Love You With All My Heart |
| IM | Instant Message |
| IMAHO | In My Absolutely Honest Opinion |
| IMAO | In My Arrogant Opinion |
| IMAP | Internet Message Access Protocol |
| IMBO | In My Biased Opinion |
| IMCO | In My Considered Opinion |
| IMD | In My Defence |
| IMDB | Internet Movie Database |
| IME | In My Experience |
| IMEO | In My Educated Opinion |
| IMF | International Monetary Fund |
| IMH | In My Head |
| IMHO | In My Humble Opinion |
| IMK | In My Knowledge |
| IMMAO | In My Most Arrogant Opinion |
| IMMD | It Made My Day |
| IMML | It Made Me Laugh |
| IMNSHO | In My Not So Humble Opinion |
| IMO | In My Opinion |
| IMOO | In My Own Opinion |
| IMP | It’s My Pleasure |
| IMPO | In My Personal Opinion |
| IMR | I Mean, Really |
| IMS | Irritable Male Syndrome |
| IMSMR | If Memory Serves Me Right |
| IMU | I Miss You |
| IMUSM | I Miss You So Much |
| IMVU | Instant Messaging Virtual Universe |
| IMWTK | Inquiring Minds Want To Know |
| IMY | I Miss You |
| IMYA | I Miss You Already |
| IMYM | I Miss You More |
| IMYSM | I Miss You So Much |
| IMYT | I Miss You Too |
| INAH | I Need A Hug |
| INB | I’m Not Bothered |
| INBD | It’s No Big Deal |
| INCYDK | In Case You Didn’t Know |
| INPO | In No Particular Order |
| INRS | It’s Not Rocket Science |
| INS | I’m Not Sure |
| INTK | I Need To Know |
| INTP | Introverted iNtuitive Thinking Perceiving (personality type indicator) |
| INVU | I Envy You |
| INWLY | I Never Wanna Lose You |
| INY | I Need You |
| IOAB | I’m On A Boat |
| IOC | International Olympic Committee |
| IOH | I’m Outta Here |
| IOI | Indication of Interest I’m Over It |
| IOIC | If Only I Could |
| IOKIYAR | It’s Okay If You’re A Republican |
| IOM | Isle Of Man |
| IOMW | I’m On My Way |
| ION | In Other News |
| IOU | I Owe You |
| IOW | In Other Words |
| IOYK | If Only You Knew |
| IP | Internet Protocol Intellectual Property |
| IPA | India Pale Ale Internet Protocol Address |
| IPC | Ignore Post Count |
| IPO | Initial Public Offering |
| IQ | Intelligence Quotient |
| IR | Infrared Injured Reserve |
| IRA | Irish Republican Army |
| IRAH | Insert Relevant Acronym Here |
| IRC | Internet Relay Chat |
| IRDC | I Really Don’t Care |
| IRDK | I Really Don’t Know |
| IRL | In Real Life |
| IRLY | I Really Like You |
| IRMC | I Rest My Case |
| IRS | Internal Revenue Service |
| ISB | I’m So Bored |
| ISBN | International Standard Book Number |
| ISDK | I Simply Don’t Know |
| ISDN | Integrated Services Digital Network |
| ISHK | I Should Have Known |
| ISLY | I Still Love You |
| ISO | In Search Of |
| ISP | Internet Service Provider |
| ISS | International Space Station I’m So Sorry |
| ISSN | International Standard Serial Number |
| ISTATOY | I Saw This And Thought Of You |
| ISTG | I Swear To God |
| ISTM | It Seems To Me |
| ISTR | I Seem To Recall |
| ISWYDT | I See What You Did There |
| ISWYM | I See What You Mean |
| IT | Information Technology |
| ITA | I Totally Agree |
| ITAI | I’ll Think About It |
| ITALY | I Trust And Love You |
| ITC | In This Channel In That Case |
| ITF | In The Future |
| ITG | In The Groove |
| ITIAILWY | I Think I Am In Love With You |
| ITIKY | I Think I Know You |
| ITILU | I Think I Love You |
| ITILY | I Think I Love You |
| ITK | In The Know |
| ITM | In the Mouth |
| ITMA | It’s That Man Again |
| ITN | I Think Not |
| ITO | In Terms Of |
| ITOY | I’m Thinking Of You |
| ITP | Inside The Perimeter |
| ITS | I Think/Thought So |
| ITSO | In The Style Of |
| ITT | In This Thread |
| ITTET | In These Tough Economic Times |
| ITV | Independent TV (UK) |
| ITWYM | Is That What You Mean? |
| ITYF | I Think You’ll Find |
| ITYL | I’ll Tell You Later |
| ITYM | I Think You Mean |
| ITYS | I Told You So |
| IVF | In Vitro Fertilization |
| IWALY | I Will Always Love You |
| IWBB | I Will Be Back |
| IWC | Internet Wrestling Community |
| IWHI | I Would Hit It |
| IWID | It’s What I Do |
| IWIK | I Wish I Knew |
| IWIWT | I Wish I Were There |
| IWM | It Wasn’t Me |
| IWOOT | I Want One Of Those |
| IWTD | I Want To Die |
| IWY | I Want You |
| IYAM | If You Ask Me |
| IYBTYBA | If You Believe That, You’ll Believe Anything |
| IYD | In Your Dreams |
| IYDK | If You Didn’t Know |
| IYDM | If You Don’t Mind |
| IYF | In Your Face |
| IYGM | If You Get Me |
| IYH | In Your Head |
| IYKWIM | If You Know What I Mean |
| IYL | If You’re Lucky It’s Your Life |
| IYO | In Your Opinion |
| IYSS | If You Say So |
| IYSWIM | If You See What I Mean |
| IYTT | If You Think That |
| IYW | If You Want/Will |
| IYWW | If You Were Wondering |