Top definition
abbreviation for Obersturmbannführer; A nazi party rank used by the SS and SA in the second world war
All hail the OSF
by Her Kommisar March 06, 2011
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2
Referring to the One Star Fairy in the CBS forums. An O.S.F. is a Phaenomenon occurence in which every post is rated 1 star out of a possible 5. There is no actual member who is the O.S.F. it is just a speculated phantom. It is mainly associated in the NCIS forums.
I think the O.S.F. has been through here today.

or

The O.S.F. has landed.
by Random Sightings April 16, 2010
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3
Old scrotum face, coined by Chris Hovey a spurs fan to describe Harry Redknapp.
That OSF is useless!
by scarls June 28, 2012
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4
my former place of employment, also stands for Only Stupid Fuckers
Only stupid fuckers worked at OSF
by cmac44 February 12, 2007
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5
OHHHH SHIIIT FUUUCK
"did you fsu today?"
"osf i forgot"
"FSU!!"
"OSF!!"
by exus345 July 10, 2008
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6
Look at that dude, he thinks he's OSF
by Doc23 August 27, 2010
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