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 5, 2006
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short version of "Wassup", "What's up", or "what up"
by ac January 31, 2004
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An acronym for "Stand Up Paddling"
A sport involving standing on a surfboard with a paddle.

In Hawaiian it's "Hoe he'e nalu"
Sun is out and the water is calm, want to go SUP?

Let's grab the gear and go!
by Planely C March 15, 2016
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1. An abbreviation of "what's up?"

2. A surefire way of killing a conversation before it's even begun.
Bill: Hey.
Ted: Hey.
Bill: Sup?
Ted: Nm, u?
Bill: Nm.

*close conversation window after 30 mins of inactivity*
by Noiree February 27, 2010
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you have just been friendzoned.
guy texts a girl: hey beautiful
girl replies: sup
by jess26 October 16, 2014
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What one would say in one's company in the morning of a glorious sunny day in Buckinghamshire, England.
Sup Jeeves, how are you feeling this fine morning? After I butter your scone would you like me to fetch your 'Fox Hunting monthly' magazine and open it to the 'letters' page?
by Muckle Flugga October 8, 2006
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