1 definition by Flav91

Top Definition
Acronym for "fuck shit up".
The act of fucking shit up. Applies to partying really hard, trashing the environment around you, or just being hardcore.
Man we`re gonna FSU so hard tonight at the show!

We just went in to the party and FSU`d!
by Flav91 May 25, 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.