the word is a derivitive of for sure. for sure turned into fo sho, then it was put together to form fosh.
fosh yo momma was good last night. Fiona is fosh a hotty.
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mistakenly used as a acronym meaning FUCK OFF SHIT HEAD by kewanee high school faculty members of kewanee IL. It actually is derived from for sure, but those idiots don't know anything.

not acceptable for freshmen follies t-shirts.

The principal be hatin on me for talking slang. I told him to FOSH
by lame like betty October 19, 2008
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absolutley sure; definite. prefix of for sure.
woah. karlye your hair looks good. fosh.
by taylorr :] October 19, 2006
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a shortened fo sho or fo shizzle meaning yes, okay, for sure.
"Do you want to go to the movies?"
"Fosh!"
by via joi May 19, 2007
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shortened version of fo sho.
pronounced foe shhh.
"americas best dance crew is the best show everrr."
"fosh"
by E leadz July 10, 2008
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mistakenly used as a acronym meaning FUCK OFF SHIT HEAD by kewanee high school faculty members of kewanee IL. It actually is derived from for sure, but those idiots don't know anything.

not acceptable for freshmen follies t-shirts.
The principal be hatin on me for talking slang. I told him to FOSH
by black betty 16 October 21, 2008
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