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1.
A step up from two-timing.

A person who's seeing three people all at once, whether it's doing the dirty or just a make-out fest.
Person#1: You think she's a hoe. See that bitch over there, she's three-timing her boyfriend and the poor dude doesn't suspect a thing.

Person#2: So she's going out with him... And another guy and another one.

Person#1: Exactly
by Wild-eyes September 07, 2010
7 3