The most beautiful, perfect, and the all around sexiest thing ever. In other words, it's the most perfect thing you could possibly tell a girl.
Guy: DON'T EVER THINK YOU'RE UGLY!!! BECAUSE YOU ARE UGLU!
Girl: Aww thanks babe! You're the sweetest guy in the world! (hugs and kisses guy)
Different form of the word ugly. Often used in msn conversations when an individual is unable to hit the "y" key instead of the "u" key because of laziness.
You are so uglu!