Top Definition
Someone (usually a girl) who becomes excessively horny during a full moon, and spends the following 28 days regretting what she does that night.
Josh: Hey, are you still hooking up with Tracy?

Jake: Naw, she's a wereslut.

Josh: Oh, I guess you have to wait a few weeks before you can hit that again.
by koreitz October 17, 2008
Person working and having a normal life at daytime and prostituting itself at night, hiding this from its family and friends.
This guy doesn't know his wife is a were-slut.
by Kirochi September 13, 2006
A person, usually a girl, who becomes indistinguishly slutty at a certain time of day, or on the weekend. They are most easily spotted in their usual habitat, anywhere that alcohol is being served in abundance.
Amber: "Look at that girl over there, she looked so nice when she came into the club, what happened??"

Kate: "She's a wereslut, normal during the day, whore at the club."
by SAnne May 17, 2013
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