Top Definition
An acronym for Fuck You, You're Stupid.
"That guy parked so close that I couldn't open my door. So I wrote FYYS on his dirty window."
by ameloblastoma December 03, 2009

Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from daily@urbandictionary.com. We'll never spam you.

×