1 definition by JHornDog

Shamu

The act of when your girl is riding you in the reverse cowgirl position, you suddenly reach up behind her back, grab her pony tail, and then yank her down backwards in fast and forceful manner. Then, as if to be splashed by water, you cum in her face.

Man my girlfriend has been messing around on me, so last night I pulled the Shamu on her.

by JHornDog October 2, 2010