It's when a guy is fucking a girl in the ass, then goes to her pussy, and finishes in her mouth.
Tyrone gave Sheniqua a peanut butter shake after he found out she was cheating on him.
A prank where you accidentally or intentionally get shit on your fingers (see Peanut Butter Fingers) then shake the hand of a friend (or enemy)
To get even with my ole buddy Brian I believe I'll give him a Peanut Butter Hand-Shake
1. Abbreviation of “Penis, nut, and shake” referring to the male orgasm
2. The act of procreation
“At the end of the day, we’re all just the leftovers of a Peanut shake.”