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1. Term used to mock groups of sweaty nu-metal bro fags pushing eachother aka. the mosh pit.

2. Telling somebody they didn't something cool.
1. Look at that sick mosh, lets fight them.

2. Person A: " Dude, I just went to Taco Bell! "
Person B : " Oh Sick mosh!!! (incredibly sarcastic tone) "
by fishyfishy September 06, 2008
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