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
with an actual response (Ex 1.)
do in fact actually respond to the question with an answer but quickly disregard it and fray away from
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?"