look up any word, like pussy:

1 definition by 7thgradeslut

middle schoolers favorite dance. When a girl moves her ass in the guys crotch. He gets all hard with his boner and its awesome for both of them. Especially when they both know what theyre doing.
Jen: Did u c william grinding her?
Eliza: Yeah u could tell he was having a boner the minute after they started.
Jen: it looked fun!
by 7thgradeslut October 16, 2011
8 5