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A perfectly spherical piece of human feces. The flawlessness of the specimen is made by the general looseness of the anus through which the "molly gann" passes.

(This is a play on the word "mulligan" and has no reference to any person.)
I shouldn't have eaten so many puffy tacos; all those molly gann's in the toilet made me apprehensive about what I did last night.
by rgxoxo February 06, 2010
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