A shortened version of shut up
Often pronounced with a pause shu-up

"shut up" as one word. Commonly used by Celeste players.

It's another way of saying "sup" or "what's up". It can also be used to express an action. To shup some birds would mean to get some bitches.

A SHUP IS A SHEEP OR FLOCK OF SHEEP. WHEN I CALL MY SHEEP BACK TO THE BARN, I YELL "SHUP SHUP" AND THEY KNOW ITS TIME TO EAT SOME HAY.

A mix of shut up and chup