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You'r full of shit.
Use to scold a person who bluff and talk about something that is untrue.
A: I just hv sex with your bitch. Dude, you are pwned!
B: My balls. Yfos
by Elyn March 17, 2007
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YOUR FULL OF SHIT, ACROMYN To be shouted out during TV news when the talking heads utter banal stupid stuff.
It's 7 Oclock time for Oberman to spew. I want to grab his ears and yell YFOS so he gets the message.
by Mudlido November 17, 2009
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You’ll find out
Mom: You’re not going out Friday night.

Kid: YFO, yes I am.
by Trooperf May 18, 2018
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