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1.
(Noun) An individual who does good deeds excessively, in order to get "good Karma" in return. They generally pick up trash, offer shallow compliments, or hold the door open for any individual if they get the chance.
That guy is letting way to many people merge into this lane... what a Karma Slut.

Sean Penn.... Huge Karma Slut!

Santa Claus, definitely a Karma Slut.
by esverdad May 12, 2009