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verb: 1. To shut up 2. To shut the fuck up

Origin: The "up" language
Girl: "Blah, blah blah, hahahehehe blahblahblah"
Boy: "Sh'up"
Girl: "Hahehe blahblah, what?"
Boy: "Sh'up"
Sh'up by Damn Ma'am! February 4, 2010

Sh'up lil' foo'

What one says to a crying baby, in the middle of a hall in a high school.
"Sh'up lil' foo'" -Some random guy I saw in the hall once.
Sh'up lil' foo' by Sallz October 15, 2007
a way to say shut up when you are bored. you say it with a flat tone. also, for people who are picky about language, you say shupup and they cant consider it a bad word cause it isnt. another thing is if someone is really bothering you, you say shupup noob, drawing out the noob.
"I'm checking my facebook, shupup noob!"
"shupup man, that joke sucked."
Shupup by Shupup noob March 24, 2009