k cool is a term used when a person makes a comment not worth replying to, or does something that is pointless.
Jane Doe: I had such a big lunch
John Doe: k cool
by kcool10/15/10 December 7, 2010
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a phrase said when something weird has happened, your waiting for something, someone tells you do to do something you dont want to or other things like that
"Honey, go clean your room!" - mom

"k cool real mature" - you
by marcus jensen September 2, 2007
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its a phrase used when something to you has just been done that u thot was dumb or weird. Also if something isnt going ur way u might say this phrase
(your mom just told you to clean your room)(you would say)
"k cool real mature"
by marcus jensen August 15, 2007
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