A common greeting that has an ambiguous meaning which leaves the recipient confused and uncertain on how to respond.
Person 1: Sup.
Person 2: Uhh... wait am I supposed to say 'sup' back or am I supposed to tell you how my day went?
Person 1: uuhh... idk.
Person 2: Uhh... wait am I supposed to say 'sup' back or am I supposed to tell you how my day went?
Person 1: uuhh... idk.
by StuffTheChicken420 October 21, 2021
Get the Supmug. Same as “what’s up”
by 123456789_whatismyname_yoyo August 2, 2019
Get the Supmug. 
Despite the feeling to say to your friends"sup!" Sup is actually a mixture between a best friend and a friend. If your best friends with someone, but have lots of arguments, but don't want to be 'just' friends, sup is the perfect thing to be!! Sup's are fun, kind, free willed, and don't get angry quickly. They are patient with each other, and despite not knowing the other for a while, can still be a loyal Sup!
"I'm sorry for the argument. I don't think we can be besties."
"I feel friends is to small of a relationship thought"
"Ok. Let's be Sup's instead."
They look like they're Sup's!
"I feel friends is to small of a relationship thought"
"Ok. Let's be Sup's instead."
They look like they're Sup's!
by Unicorn_fluffy_sparkles July 6, 2018
Get the Sup'smug. by O'Mally December 28, 2005
Get the supmug. 
by captain daddy 24 May 30, 2018
Get the was supmug.