Sup is something cool people say. It can be used as a greeting. People say "sup" when they don't feel like saying whats up because it's to long. Also, people say "sup" because they get in the habit of saying "sup" so they just always say it. It can be used by girl or boy.
"Sup girl"
"Nothing much"
"Cool"
"Sup with you"
"Nothing"
by Cleo Defobio September 28, 2015
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A term that cool people use because they are too damn lazy to say What's up. (Too much effort involved there man.)
by RockStarSurferChick March 21, 2003
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Short for 'What's Up?'. 'What's Up?' is short for 'What is Up?', and 'What is Up?' is short for 'How are boring daily events in your life going?'.
Guy 1: 'Sup, man?
Guy 2: Pretty cool, man, you?
by A Person who uses a Pseudonym October 06, 2012
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How everyone starts an IM convo after saying hey. It is then always followed by "nm"
sn1:hey

sn2:hey

sn1: sup?

sn2: nm u?

sn1: nm
by Jimmy Joe December 24, 2003
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The "point" to a "sup" is one trying to say hello, sup was derived from wassup, which is another variation of What's up. What's up isnt an inquiry but an informal way of saying hello, although it can at times be answered with an actual response (Ex 1.)
Many do in fact actually respond to the question with an answer but quickly disregard it and fray away from it... another way of responding to it would be (Ex 2.)
Ex 1.) "Sup matt?", "Nothing much just watching gay porn on my computer"

Ex 2.) "Sup jew?", "Hey man, havent seen your ass in a long time... wanna hang out on Saturday?"
by Jagged Edge January 04, 2006
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