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2.
A term of endearment for someone you go to for casual sexual encounters. Essentially a relationship with little or no commitment of sorts, but with ability to give them a root at there request in return.

Also relates to people of a promiscuous nature

AKA - Fuck buddy
AL: - "Are you still seeing that root bag ex of yours?"

Me: " Yea, we did it backwards froggy style last nite."

AL: " You are such a Playa. "
by ALfullaBAY January 15, 2011
 
1.
A woman whom frequently engages in sexual intercourse. Normally with multiple partners.
Jamie: Did you hear Janey fucked ten men?
Friend: She is such a rootbag.
by Master Of Cunts Returns February 05, 2009