look up any word, like sex:
 
3.
a guy that does anything you want that isn't your boyfriend and you can still get with other guys. the best thing a girl can ever have.
c: are you with your side piece?
j: nah im with another guy
by jockin ohyeahhh November 13, 2010
 
1.
The other woman. Also see Goomad.
My side piece is tight!
by Louie March 15, 2005
 
2.
a girl on the side, a girl you call up at 2am and she knows whats up, no attachments just fuckin', just make sure the girl know she a side piece
Sam: yo dude where you off to so fast?

Dave: I'm off to go poke my side piece nigga!
by gettinjazzy October 04, 2010