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a slang and careless word often used when in a state of arousal or lame sarcasm
Derek, "Oh Martha your breasts are fattyfattyboomboom (orgamsm)

Enrique, "Hahaha fattyfattyboomboom!" (Piss pants)
by rawk god January 06, 2007
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2
you are so fat that you can't play anything
Person 1: OI WEE TWAT YOUR A FATTY FATTY BOOM BOOM
Person 2: (crying) FUCK OFF
via giphy
by _PugFan123_ December 16, 2018
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