Short for 'flea penis'. It is mostly used when referring to Francoeur, a giant 7ft. flea from the movie 'A Monster in Paris'. A fleenis is typically 10 inches long.
Vanya: I thirst for that fleenis my bru.
by Prussian Coke December 29, 2017
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Fleenie, Flesh-Beanie. Another word for a bald person, as it looks like they are wearing a beanie made out of flesh.
Wow Malcom, check out that Guy he's got a Fleenie.
by Fleenie hater June 27, 2010
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