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An acronym for "Fat sack of shit", commonly used to insult people over the internet for being fat in real life.
Stfu you fsos go loose some weight.
by Jack stern June 11, 2008
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2
An acronym for "Fat sack of shit", commonly used to insult people over the internet for being fat in real life.
Stfu you fsos go loose some weight.
by Bob welling June 13, 2008
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3
eg. an individual who has reached the bottom of a curve, at a minus platform, giving him/her no options other then selling out.
F.S.O.

by ~GTS~ August 10, 2008
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4
An acronym for "Fat sack of shit", commonly used to insult people over the internet for being fat in real life.
Stfu you fsos go loose some weight.
by Jack stern June 11, 2008
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The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

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5
I came home from work today and my girlfriend was was screwing the gardener FSO!!!!
by Meta4Tony November 14, 2011
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6
FSO is cool.
by Tomtom joejoe January 28, 2009
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