When a girl rubs her ass all over a guys penis. For the girl, even if she's doing all the work it still makes her wet and makes her want it to go on forever. For the guy, he just stands and enjoys. It's a win, win situation besides the fact that it never last long enough.
Tiffany grinded her ass all over Aidan's penis till he got a boner, Tiffany and Aidan both enjoyed grinding each other.
by -chuck. July 10, 2008
Dirty Dancing. When a girl moves her ass on a guys dick to turn him on. Or when the girl and guy face eachother and the girl rubs her pussy with the guys dick or humps his leg. It's any sexy or suggestive dancing.
I grinded with my boyfriend at prom untill he got hard as a rock.
by progrinder July 02, 2005
The act of dancing where you rub your penis on a girl's ass in a dancing fashion It feels really good and it never seems to last long enough. Sometimes it can get really graphic and god does it feel good.
Dude, I loved grinding that blond babe with the huge ass!
by jonathanhigh5 July 15, 2006