Top Definition
One Special Mother Fucker

Mainly used to describe young coworkers that think they are the shit.

Also used for anyone whos shit don't stink.
Andy sure thinks he is OSMF, what a flaming douchebag!
by Carpmaster November 21, 2008
1 more definition
Oh Shit MotherFucker
'OSMF' did you see that ?!?!?!
by RussY757 August 21, 2010

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.

×