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1.
for shits and giggles
Dude, let's roll his car in a lake just FSAG.
by AARP1 April 28, 2011
 
2.
an abbreviation of shits and giggles
mother: son what the beep are you doing, putting scissors in the kitchen plug? is this f-sag?

James : lol it's to impress my physics teacher in elementary school, to show that I know what electricity is.
by Sexydimma May 25, 2012