generally used by those who are well-endowed with the particular trait they refer to, ie. supercool, beautiful, fit etc.
"aye, she's such a fucking non"
Slang term placed in front of a word to emphasize a negative aspect.
James: OOOOO! My lunch break is in an hour! Ima go play on my Gameboy SP until then! *runs downstairs*
Boss: *runs to the top of the stairs* Get your non-workin ass back up here NOW!