Sup is a shorter way of saying What’s Up

Frickin stupid dude the sky’s up you dumb frick

A term that cool people (expect Mijalli) use because they are too damn lazy to say What's up. (Too much effort involved there man.)

A shorter way of saying 'what's up?'

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!

(abbr.) What's up? How are you? -- see sup yo

Noun: A slang term used for alcohol, generally by those of English, Irish, or Scottish descent.