look up any word, like cunt:
during the act of sex when a girl cums in large amounts all over you like a waterfall
ex: Jake: Hey dude, did you have fun with Jaime last night.
Nate: Hell yeah dude! She waterfalled
Jake: Sweet man! I wish my girl would have waterfalled.
by foxdirtbikeracer4lyfe February 27, 2011