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contraction of "not kosher" (synonymous with weak, not cool, and lame)

"Not Kosh" means that whatever it is being said of is simply not alright, or acceptable.
"i gotta confession to make, man. i got knocked out, and next thing i know, i'm waking up.. in bed.. naked.. being spooned Ogarth, that hairy viking warrior from the past."

"oh, bummer dude! your ass feel alright?"

"fuck no! feels like i've had a tree trunk up in me!"

"damn, dude."

"but.. you know.. i kind of.. like it."

" ...Not kosh, dude. Not even kosh."
by teensies August 09, 2005
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