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a person, of either male or female persuasion and of either sexual orientations who is said to be, or proven to be, permiscuous in nature.
1 "she is such a cumtank";

2 "he is a cumtank";

3 "whatever cumtank"
by flangeru slutten September 08, 2009
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A female (or fag) that tends to guzzle large quantities of cum.
damn, that ho is a cum tank.
by george smith February 21, 2004
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