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1.
Go Fuck a Duck
by Anonymous October 07, 2003
 
2.
Comeback in an awkward arguement which always works:

Go Fuck A Duck
"Ur gay"
"Sweeney, GFAD"
"What the hell"
" I sed go fuck a duck"
by jk2705 July 02, 2007
 
3.
Acronym. Go fuck a dog.
by luser November 21, 2002