Someone who ruins a page of interesting definitions by posting the actual definition of said word.
Def 1. Sex - What kind of moron are you that you look up sex in the urban dictionary?
Def 2. Sex - 1) The act of intercourse
2) Another word for Gender
Much like how a person who ruins a party is called a party pooper, the person who wrote the second definition is a UD Pooper.
The act of winning, usually multiple times in a row. Often in the context of a videogame.
Wow, I am really crushing face at Starcraft today. I just got promoted!
Rich crushes face at online scrabble. He never loses.