look up any word, like donkey punch:
 
1.
YFS
Meaning Your fucking stupid
Person 1: I GOT THE NEW IPAD!!!!
Person 2: YFS u bought an oversized iPod touch.
by asdfghjkl<3333 August 08, 2010
 
2.
yfs
ya fuckin serious?
Guy Number One: I just shit my pants
Guy Number Two: yfs?
by bivdog August 27, 2009
 
3.
YFS
Young Free and Single
I'm YFS.
by greeneking April 22, 2009
 
4.
yfs
your fucking sexy
YFS
by adriancitoow July 14, 2011