| | klb | | known lazy bastard |
| | KMAGYOYO | | kiss my ass goodbye, you're on your own |
| | KMB | | Kiss My Butt |
| | KMFA | | Kiss My f**king Arse |
| | KMFA | | kiss my f**king ass |
| | KMI | | Key management Initiative |
| | KMIA | | Kiss My Italian Ass |
| | kms | | Killing Me Softly |
| | kms | | Kilometers |
| | KMWIH | | Kiss Me Where It Hurts |
| | KMYF | | Kiss Me You Fool |
| | knim | | know what i mean |
| | ko | | knock out |
| | ko | | knockout |
| | KOS | | Kids Over Shoulder |
| | KOS | | Kill On Sight |
| | kotg | | keeper of the grove |
| | kotl | | kiss on the lips |
| | KOTP | | keepers of the Peace |
| | KPH | | kilometers per hour |
| | KPI | | Key Performance Indicator |
| | KRA | | key result area |
| | KSA | | knowledge skills and ability |
| | ktcootn | | keep this crap out of this newsgroup |
| | kutgsawyad | | keep up the good spirit and whatever you are doing |
| | kutgw | | keep up the good work |
| | kvm | | keyboard, video and mouse |
| | KWIC | | keyword in context |
| | KWOC | | keyword out of context |
| | kwtii | | know what time it is |
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