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"Let me buy that fat sac off you."
by tha dude December 17, 2006
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2
A water filled bag used to add ballast to boats in order to produce a larger wake. This enables wakeboarders to get more air.
The Fat Sac ads up to 600 pounds of weight to your boat.
by TT September 12, 2003
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3
An exceptionally large scrotum.
DAMN!!!!! DAT fool's got a FAT SAC!!!!
by fun-o-bunz August 13, 2003
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4
Its a sac of fat that is someplace on your body you don't want it
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