A text message you send to someone to let them know you want to talk by phone, but do not want to call the other person without warning, usually because of the time of day and the fear of outright assault by ones wife. Can be used alone as a single word or as part of a compound word with other words added to it, such as supdog, sup-per, sup-foo, etc.

Sup requires either a return phone call or a ready why the other party can't talk at that time. Ignoring a Sup is an indefensible violation of the bro code.
Sup is not used in a sentence.
by Clard August 26, 2017
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A shorter way of saying 'what's up?'
Person 1: Sup, bro?
Person 2: not much, bro.
by D€€z Nut$ December 25, 2015
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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!
by Unicorn_fluffy_sparkles July 6, 2018
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Noun: A slang term used for alcohol, generally by those of English, Irish, or Scottish descent.
Dicey Riley has taken to the sup.
by O'Mally December 18, 2005
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hi greet someone in a savage way
hey there was sup or was sup my guy
by captain daddy 24 April 26, 2018
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sup what u doing
by gurnademan March 24, 2010
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