Top Definition
1. A remark you shout when something is cool, great, ok. Used in place of 'sure' or 'sounds good' or 'yeah, i'll meet you at the pub at 10'. A word of assurance and confirmation

2. An adjective to describe something which is cool. Cool as in smooth, wicked, nice.
1. "Hey, when are you home?"

"Probably about 7 ish"

"Coolcha. See you then"

2. That shirt is coolcha. I've gotta get myself one of those
by friendofcoolchainventor December 29, 2010

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