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when someone does something that is not acceptable, "Not cool man!" is usually an appropriate phrase to inform them that what they did was not nice, cool, funny, or tolerated by society, or just you.
Uncool guy: My butt is so awesome....
Cool guy: Not cool man!
by Shiraz rocks mannnn February 03, 2018
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Oct 3 Word of the Day
I couldn’t care less (but one must keep up appearances, right?)
Frenemy has a family tragedy. "Thoughts and prayers."
by November 05, 2018
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