1: dude is what you call someone when you aren't sure about their name
2: what you call your best friend

A word that can be used in ANY situation in replacement of an actual sentence.

A word that americans use to address each other. Particularly stoners, surfers and skaters.

1) Originally, “dude” meant a stuck up person who dressed overly well. It first emerged in the year 1883 in England.

2) Later it was used in the old west to mean a city person who moved to the west without actually know what he was doing. Synonymous with “city-slicker”

3) Later, in California, the term changed from these insults to a term meaning any male, human or otherwise. Sometimes it is used in reference to tom-girls. Now, it is often used for emphasis as well.

1) The Universal Prounoun
2) Adj - expression of emphasis, amazement, or awe

1. An aggravated hair on an elephant's butt.

2. The substitute for someone's name when you don't quite know it properly

1) n. a name for anyone (stereotypically used by male surfters/skaters but now accepted by any race, sex, religion, and wealth)
2) n. something that's just so awesomly cool, amazingly kick ass
3) ?. a way to start a conversation
4) replacing "um" or "like" in any sentence