When you put peanut butter on your hand and slap a guy on the face leaving a handprint of peanut butter. Invented by Andy Milonakis.
Vasily got me mad so I peanut butter slapped him while he was jacking off.
by DenisK August 14, 2007
1 more definition
When one has peanutbutter on their hand and yells "peanutbutter slap" and slaps them hard on the face
Man I gave him a peanutbutter slap because he wouldn't shut up!
by shambly March 23, 2010