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A adjective for a person that is cool but slightly immature.
Girl one: "He's cute and all...but sorta coo."
Girl two: "I hadn't thought about him being immature...but yeah. Totally coo."
Coo by hawishyouwereme? October 26, 2009
Related Words
cool Coopers cookie Coons Cookies cool beans cooked coolio cooter coochie
a word really awesome people use. those peeps are so amazing that the L is just dropped in the lame word: cool. but you have to have enough swagger to pull off a word like coo or else it'll sound stupid.

if you have coo down you ready to face the world
person 1: woa your shoes are sickk

person 2: yea ikk

person 3: ugh so awesome wish i was coo like you
coo by bunk24 November 1, 2012
short version of the word coosh, the bomb marijuana.
Lets roll a blunt of some chron.. na bro i got me the bombs, purple coo. Enough said lets smoke.
coo by Big Boi June 18, 2006
the word that mike and megan started to say instead of cool.
man this has to be one of the cooest things that i have done in my life.
Coo by Mike November 10, 2004
Gurls pussy or vagina or the gurls genitalia
damn gurl yo coo smellin like ass
COO by DR.KIRKWOOD August 1, 2007
Our COO informed us that she gonna find new job.
Coo by Delfy January 25, 2017