used on Instant Messengers as 'what's up' as in a greeting, also used as a meaning of cool
dude: sup
guy: doing nething?

dude: look at that sup guy chatting up the Blonde
by lucozadedude August 08, 2005
what you use to say hi like when ur meet ur freind you greet them with sup
gurkirat said sup to artheez
by pritesh April 26, 2005
This word can mean anything.

Generally, it is a shortened version of "What's up?"

However, it can also mean, "I stole your CD player." or a million other things, based on the tone of voice.
by Jesse August 11, 2003
When you're lazy and don't have the strenth, energy, or you just don't care to say "What's up?", just settle on "'S'up?".
"'S'up, homefrog? Howzit hangin' with choo?"
by Unknown July 17, 2003
adj., Samoan, Indicating something of extreme size especially pertaining to the cranial area.
Look at that dudes SUP head.
by Dr. "T" June 17, 2005
Way to say "hello"
Sup dogg?
by Anonymous_2 December 14, 2003
Short form for superior, used like great, excellent or gr8.
Sup is used with an ! while standard sup (meaning whats up) is used with an ?.
Mike: Dude, I like totally owned that bitch in WoW.
Paul: Sup bro!
by petrr July 14, 2006

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