Sup is a very nutty word that can be used in greeting one eachother when the person is a tank.
or
Suuuuup, can be used as an expression of excitement.
Aya: Hey Sup, how u doin?
Nutanese: Hey Sup!!! i am great how about you?
Aya: I'm great too! suuuuup
Nutanese: Suuuup
OBVIOUSLY a misspelling of soup.
Ignoramous: Hey dude, gimme some sup!
Normal Person: Don't you mean soup, retard?
Same as “what’s up”
“Sup dude, want to go and play a game”
'Sup' is simply a shorter version of what is up. If you say it quickly you will say sup. This shut so getting boring now so im going to stop.
Sup fuckers