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the best asian last name in the world. not very common, but special. spelled by most white kids goo,
prounounced goo.

people with the last name gu are always smart. the girls are hott and the boys get girls.
"hey gu, whats the homework?"

"Hey did you hear george gu got his girl classmates to like him at the age of 10?"

"oh yeah, of course, hes a gu."
by gg&hgGU August 11, 2009
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A person who is both smart at things he wants to learn, but needs to take a break once in a while.
Hey Gu, Stop getting A's!

To Gu or Not to Gu, that is the question.
by Scott October 28, 2003
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A: Gu Mofo.

B: What the hell are you saying?

A: Get the fuck up and let's go motherfucker!
by Sorosh Omidi March 25, 2007
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"Great guy and all, but totally gu -- he lives all the way in Boerum Hill!"
by zooa November 3, 2003
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Giggling uncontrollably-used because it is shorter than lmao, and more expressive than lol.
by Fruitloop January 9, 2005
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When your stupid ass friend hits the keyboard as you are trying to chat in an online video game, but all he manages to get are the keys gu.
"hey man which way next?"

"gu"
by Ddog August 9, 2003
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