| Acronym | Meaning |
| KAFM | Keep Away From Me |
| KCACO | Keep Calm And Carry On |
| KCCO | Keep Calm and Chive On |
| KD | Kraft Dinner |
| KDR | Kill/Death Ratio |
| KF | Kinda Funny |
| KFC | Kentucky Fried Chicken |
| KGB | Russian secret police |
| KH | Kingdom Hearts ( ) |
| KHYF | Know How You Feel |
| KIA | Killed In Action Know It All |
| KICKS | Shoes Thrills |
| KIG | Keep It Gangsta |
| KIM | Keep It Moving |
| KIO | Knock it off |
| KIP | Sleep Bed |
| KIR | Keepin’ It Real |
| KIRF | Keeping It Real Fake |
| KIS | Keep It Simple |
| KISA | Knight In Shining Armour |
| KISS | Keep It Simple, Stupid |
| KIT | Keep In Touch |
| KIU | Keep It Up |
| KIV | Keep In View |
| KKK | Ku Klux Klan |
| KKKK | Korean LOL |
| KM | Keep Mum |
| KMFC | Keeping My Fingers Crossed |
| KML | Killing Myself Laughing |
| KMN | Kill Me Now |
| KMP | Keep Me Posted |
| KMT | Kiss My Teeth |
| KMU | Keep Me Updated |
| KOD | Kiss Of Death |
| KOS | Kill On Sight |
| KOTC | Kiss On The Cheek |
| KOTH | King of the Hill (game) |
| KOTL | Kiss On The Lips |
| KOTOR | Knights Of The Old Republic (Game) |
| KP | Korean Pride |
| KPC | Keep Parents Clueless |
| KPG | Keep the Party Going |
| KPI | Key Performance Indicator |
| KR | Kind Regards |
| KRO | Keep Right On |
| KS | Kill Steal |
| KTBFFH | Keep The Blue Flag Flying High! (Chelsea FC Moto) |
| KTBSPA | Keep The Backstreet Pride Alive |
| KTF | Keep The Faith |
| KWIM | Know What I Mean? |
| KWIS | Know What I’m Saying? |
| KYFC | Keep Your Fingers Crossed |
| KYO | Knock Yourself Out |
| KYP | Keep You Posted |