This variation of the traditional simile face is used as a sexual innuendo to imply anything you want. Also can mean your listening to will smith on your itunes library.
Diverd: dude u hittin it up wit big bird tonight?
Shan: yeah dude, ;0
Diverd: ohhhh hoobashark
The most mysterious and complex number. Basically zero is nothing and something at the same time. Then less than zero is written -1 this totally contradicts the whole number.