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FMBB

an extremely fat man (or boy) who's shoulder blades look like tits or boobs thus FMBB (fat man back boobs)
dude 1: woah that kid is fat

dude2: FMBB!!!!

dude1:hahah hell yeah
by biggieblack March 18, 2010
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mugGet the FMBBmug.
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