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A girl who has sex all the time with everybody she knows and everybody she doesn't know and doesn't care about the consequences.
Guy 1: Look at that twurker.
Guy 2: Yah, she was up my house last night.
Guy 1: Foreal? she was up mine too!
by Precous April 03, 2007
A lurker on Twitter.
He's a twurker, and never tweets.
by sexterdude September 18, 2010