look up any word, like basic bitch:
 
5.
Noun: Refers to an acquaintance, FaceBook friend, classmate, work associate, indirect friend, (e.g. a good friend's friend), or any individual not quite within the realm of closeness required to be deemed a "real" friend.

Coined from the "sup dude" slurred toward supdudes when passing by since there is simply no other interaction or common experience worth sharing.

*Supdude is a completely subjective term such as "friend" or "brother." A supdude to one could be a friend to another.
"How was the party?
"It sucked it was just me and a bunch of supdudes."

"Who invited all the fucking supdudes?"

"Is that your friend or just some supdude?"
by Miley Coyote April 24, 2012
 
1.
the only way to properly greet someone
sup dude?
starcraft?
by niggerguy^^ June 19, 2011
 
2.
When you and someone else are in an argument, and the other person says they are better than you (scored more goals in a game, got a better grade, etc.) and you tell them you got the better grade or what not, adding on the end, "sup dude?" in a nonchalant manner, just to rub it in.
Jake- "Hey man, how'd you do on the test last week?"
Mike- "I got a 95, how'd you do?"
Jake- "I got a 98, sup dude?"
by Supdude93 April 21, 2009
 
3.
dude, sup?
"sup dude?"
"dude sup?"
by tomservoilla March 22, 2009
 
4.
a name given to a person of whom knows you but you can't recall his name to save your life. portmanteau of What's Up + Dude.
SupDude: Hey Hey Hey Mike!

Mike:Hey........ SupDude!

Later...

Amanda:Who was that?

Mike: SupDude.
by AgentSakur9 March 01, 2010
 
6.
A phrase extremely overused by people who are getting shittttyy! Often used as a retorical question agreeing to another persons comment instead of actually asking someone whats up.
"dude brad this chicken is delicous!"
"sup dude!"
by barnabus. January 04, 2007