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1.
YFL
An acronym mainly used in text messages. "You Fucking Loser".
"Glenn, I don't care how hungover you are right now, its party time YFL."
by deejaypuck August 18, 2013
 
2.
YFL
You Fail Life

Since you really don't want to waste any more of your time on people who fail at life than necessary, YFL is there to shorten this burden.
Idiot: "GOD DAMN, I JUST LOST A BET ON THE DETROIT LIONS"

Suave, young gentleman: "YFL."
by God's Grace From Heaven April 24, 2009
 
3.
YFL
YFL is an Abreviation of Yachtie For Life - Otherwise meaning someone who joined yachting with no intention of following it as a career path and ends up becoming YFL without realising. Usually denial is seen in the first two years of YFL.
I work on Motor Yacht Sarafsa - im YFL
by RealEasy August 03, 2011
 
4.
YFL
You Fucking Liar
Commonly used when talking in IM or even in a regular conversation.
Bob: I think your clothes are nice.
Mary: YFL Bob. I know what you're really thinking.
by The F BOMB... June 14, 2007