Dude

Dude is officually a word used to describe an infected hair on an elephant's ass, but has more popularly been used as a synonym for "you", or simply as an exclamation (or a convenient combination of both). It is also used to describe cowboys (as in dude ranch). Also spelled d00d by many of the people in internet land.

ex1) Dude. I am so wasted. Hehe.

ex2) Dude, get your fat ass over here!

ex3) What's up, dude?

ex4) Dude! Where'd everyone go?