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A slightly shortened version of "cool"
used by only the cooest people, coo is the best way to describe something that is completely awesome.
urbandictionary.com is the cooest website i visit daily.
i have such a coo life.
coo by cooest XD July 13, 2010
A way to describe yourself as being incredibly awesome.
Coo by Excelide August 19, 2019
A shortened more lazy version of the word "cool". Used when it takes too much effort to pronounce the "l".
Aw, fo real? That's coo.
Coo by Sylvia April 27, 2004
1. Coo (Verb) - A complete state of relaxation and tranquility often aided by the use of marijuana.

2. Coo(ing)(Verb) - to be in the state of "coo"

3. Coo(ed) (Verb) - When coo is broken by inconsiderate fucks, due to the lack of understanding and appreciation by "non-cooers"
1. "Rahh lecture was long, man needs to coo."

2. "Man cant stop cooing, Jah bless"

3. "I'm all cooed out" (physically impossible)
Coo by JakeKitch January 27, 2011
OMG you're so coo..
Coo by CuunCuunLips January 10, 2022
Coo is another shortened way of saying killer cool. Cartman of south park also uses it.
This site is coo, real coo
coo by don February 11, 2004