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
Butter Shakes happen when you’ve eaten too much butter and you experience a tingling sensation in your arms and legs.
I was at the movie theatre and I ate an entire Large bag of popcorn, stood up and the fuckin butter shakes hit me so hard ughh.