knifeing your ally in Call of Duty 4 while yelling peanut butter face so it looks like your wiping peanutbutter on his face with a butter knife; also used as an insult or for no reason at all; used as a filler word
1.hey, hey "name", PEANUTBUTTER FACE!!!!
2.ypu know we be rollin like peanutbutter face
3.we be lackin jelly, throw up some peanutbutter face!