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.
by jockin ohyeahhh November 14, 2010
Someone that you talk to, to your convenience while you are in a relationship. No strings attached, no stress, no expections, no bullshit.
by oxjei August 22, 2015
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
by gettinjazzy October 05, 2010
Friend: hey man, what's up with you and amy?
You: aw man, she just a side piece, i have to focus on the books
You: aw man, she just a side piece, i have to focus on the books
by Aka437 December 19, 2017
by Sleeping~Booty January 06, 2016
February 15th The day men take there side piece(the other girl he is dating on the side) out as if it were Valentines day.
Tommy bought 2 bouquets of Roses One for his girlfriend on Valentines day and one for his side piece on side piece day.
by Onblast! February 14, 2011