The act of permanently destroying someone’s kneecaps. Often done with a firearm (as popularised in film and television), a baseball bat or lead pipe or other blunt instrument, or a power drill (often used in conjunction with a countersunk drill bit and popular with the IRA).

(v) ne-kah-PING:

SHOOTING A BULLET INTO THE KNEE

OR

PLAYING FOOTSIE WITH KNEES

What the Irish IRA and PIRA did when other drug dealers got in their way, they'd take a pistol and shoot him right in the back of the knee. This would shatter the knee, thus crippling the victim for life.

to lick someone's knee caps with your tongue while having sexual intercourse. usually attempted when extremely drunk and unable to attempt anything else.