bumping nasties 

Sex, as in thrusting two hairy, smelly parts of the body into each other till gooey liquids spurt out.

We were bumping nasties all night man, she was looser than my ass after an all you can eat mexican buffet!

bumping nasties by Anonymous May 28, 2003

Bumping Nasties 

1. A synonym for the dancing form commonly known as grinding

2. A male usually standing behind a female as they both move their hips to the beat of degrading music

Everybody at the school dance was bumping nasties when the disc jockey played a sexually explicit song.

Bumping Nasties by mealsies February 27, 2007