To punch someone in the kidneys. Hurts like a bitch, and often results in pissing blood for an extended period of time.

The act of striking a person in the area of the kidney. Can cause severe internal bleeding, resulting in the incapacitation of the injured person and sometimes death.

A body shot to the kidney area when properly placed during anal sex will tighten the brown star fish.

A kidney punch is when you yell "Kidney punch!" and then punch someone anywhere except the kidney.

sticking your cock so far up a chicks ass that you poke her kidney and she pisses blood

The concoction drunk at weddings, etc. after someone insults waiter or busboy (usually latino) who then spikes punch with lighter fluid.

An emotional cheap shot, normally to a female from a male during an argument. Usually used by a man when he gets mad enough to hit a girl but won't, so instead he says something he knows will really upset her.