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When a person, place, or thing is considered to be acceptable to your standards. Most often used to describe a person who is not a complete and utter douchebag.
Person 1: Yo dawg, you know Jeremy from our english class?

Person 2: Yeah, he's pretty koo.
by Sheezyman November 26, 2009

Words related to Pretty Koo

bitchass cool guy derp douche douchebag koo