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Someone who gives their money to multiple charity organizations and flaunts the fact that they do so
Ex. 1: Susan is such a charity slut, she's always bragging about her donations to make herself seem better than people.

Ex. 2: Charity sluts may be annoying, but there have to be some in the world. If everyone were as cynical as you, the charities would never get donations!
by DJ Tomtom October 18, 2011