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1 definition by GreyDS

 
1.
The exact origin of this one is unknown (at least to me). However, FFFFF or "F-Lock" is an expression of discontent, possibly a way to avoid saying the word "fuck" by simply drawing out the F.
"Knock knock"
"Who's there?"
"Joe."
"Joe Who?"
"Joe Momma!"
"FFFFF."
by GreyDS February 14, 2009