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3. koo
a person who is a total genius. These people have GPAs of 5.1. Even though there is a lack of koo-i-ness in people, they totally own any other random last names. Comes with a huge abnormally large head. Common sense not included.
Wow did you see how that smart guy walked into a wall and then crushed it with his abnormally large head, must be a koo.
1. koo
To be kool.
That du rag be koo dawg.
by Wangsta Nov 18, 2003 add a video
2. koo
The act of which the primary aim is to gain, regain or sustain social status, by partaking in an action that the individual perceives to be "cool".
Person A embarrasses Person B in front of Girl C that Person B is trying to impress/pull/shag etc.

(Hence being koo!)

Person B would then have licence to say: "Very Koo!"
4. koo
A complete bender who is afraid of getting in trouble.
Oliver- I'm gonna kill you *sees teacher* ohhhhh nooooooooo dave- your such a koo
5. koo
koo is a sound bird-like males make when they want to attract a female.
Koo... ( You look hot, Mama!)
6. Koo
Originally the result of a mancunian attempting to mimic a seagull, the word 'Koo' is best used when stoned to warn others around you that you are in said condition. It can also be used as a substitute to just about any other word in the english language, though such usage is ill-advised as it can irrevocably damage your social life and lose you some serious pulling opportunities.
1:Basil: "Kooooooooooo im fuckin well stoned"
Trevor "Koooooooo me tooooo"

2:Gary: "Are you kooing then you koo-faced koo-dodger for koo's sake?"

Ahmed: "Koo off"
7. koo
A lovingly derogatory term for all shapes, sizes, colors, and races.

Girl1: Yo, go buy me a Bawls?
Girl2: Don't be such a f*ckin' koo.
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