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1.
An emphatic, incredulous rejoinder to a statement, which indicates one's utter rejection of that statement as being so far beyond ridiculous and/or stupid that no further discussion of it is merited, warranted or tolerable.

Used in full when spoken, or as the acronym 'FFS' in texting/chat environments.
Tweener: There's never been a singer like Justin before...like, never, ever, EVER!
Non-Tweener: Woah, FULL FUCKING STOP!!

Justin Bieber is your idol?? FFS!!

Like, OMFG...you hate the Bieber?? FFS!!

Dude, you really plan to use Justin Bieber in your Urban Dictionary Definition example?? FFS!!
by ExtremistModerate January 15, 2011