Top Definition
A freeloader, especially one who implies that once you give them something, it is ok to ask for it again or more on a constant basis. Short for "give a mouse a cookie".
Man, I am so tired of him bumming cigarettes off of me, and then asking to keep my lighter. He is such a gamac.
by Alix Lamb October 09, 2008
5 Words related to gamac

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