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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 29, 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$ April 03, 2016
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54
The abbreviated woard of 'what's up' which is a cool greeting.
Gangsta wannabee-sup

Proper gangster-the sky
by I-Proper-Gangsta July 28, 2010
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55
It came from the lazy people behind words such as hi, and yo shidigidy. Means how are you.
Sup homeyo
by Homefrog January 29, 2004
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56
A word coined in the middle age phrase "Time for SUPper, young olympian", which later changed to "Time for sup, young chap" and now it is commonly used to describe the short "meal" between lunch and dinner.
It is time for the short meal between lunch and dinner, Scotty, so come and eat up your sup.
by George Foreman May 10, 2003
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