Coo

[Sonia]

A shortened more lazy version of the word cool. Used when it takes too much effort to pronounce the l.

[Little_Girl]

Coo (Verb) - A complete state of relaxation and tranquility often aided by the use of marijuana.

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

Coo(ed) (Verb) - When coo is broken by inconsiderate fucks, due to the lack of understanding and appreciation by non-cooers

[Justin Bieber]

Coo is another shortened way of saying killer cool. Cartman of south park also uses it.

[Justin Bieber]

The sound that some of the biggest smaller birds make, better known as pigeons. Usually hanging around parks and within downtown areas of large cities, these pigeons make a characteristic cooing sound.