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2.
to chill the fvck out
i know you're pissed but you need to cool out.
by justine December 03, 2003
 
1.
-to calm down
-relax
-used synonymous with "chill out"

term was used regularly in the 1970s. rarely used presently
yo,my man, cool out son!
by sye June 09, 2005