When a man's fucking a girl in the ass and she shits on his dick. At the time he pulls out she puts peanut butter in her mouth and sucks his dick aka peanut butter cup!
Steven: "I got Tiffany to do the peanut butter cup last night."
Lee: "that's gross but you're legendary"
Steven: "her mouth was filled with peanut butter and " chocolate ".
Lee" Peanut butter cup!"
where a fat male or female take peanut butter mainly smooth and rubs it around his/her nipples, face, mouth, and hands. and dances wearing nothing but underwear.
A man puts smooth peanut butter on his nipples in an attempt to seduce a passionate lover of the same sex, in this act you can also make the smooth peanut butter into creamy peanut butter this is an example of peanut butter nips.