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1.
a fast way of saying shut up
if someones talking at the movies (David Brown, Robby Mosterds, Joe Thornton) you say shudup
by ryan dolan November 09, 2003
 
2.
The new and awesomer shut up, not only is it more fun to say, but it is also more fun to write too!
"Hahaha he so owned you!"
"SHUD UP!"
"oh, hmm ok"
by Bobo el jaffa February 17, 2010
 
3.
lazy mans way of telling someone to shut the f%&$ up
Jay is being a Nob-Ed, so I said to jay "shudup idiot".
by danfrax December 14, 2009