:U 

The face somebody makes when they charge their laser or get read to do a light beam attack through their mouths.

:U I'm charging my laser!

:U by Thomas K. August 6, 2007

U 

A Burmese title meaning Mister.

U Thant was a Burmese diplomat and Secretary-General of the United Nations, from 1961 to 1971.

U by LexAveNYC June 14, 2009

u 

A word fucking morons use instead of the word "you." VERY overly used.

hi im a fucking mron wat r u

u by I Hate Morons December 24, 2003

U: 

Sucking up

There is a lot of U: going on in this clan....

U: by Blindsfell August 7, 2008

u 

The shorthand term for you. Usually used by illiterates with low IQ or intellect, or those who are incapable of typing out a three letter word.

r u goin shppin 2day wit da pplz?

u by xxdecayingashes December 26, 2004

u 

Shortened form of "you," for people so lazy/efficient that they want to save two entire letters.

d00d, u r soooooooo smart!!!!!!!!!!11

u by Lewi the Apologist December 31, 2003

U 

Atomic symbol for uranium, a radioactive, fissile element named for Uranus.

N Korea: u got ne uranium?

Pak: y

N Korea: lol

US: u got ne uranium?

N Korea: n
US: k

U by LexAveNYC June 17, 2009