by bez then August 18, 2007
Basically the same as saying 'shut up' to someone with out sounding mean. Usually used when being goofy.
bob: "Hey, you looked really nice today."
sue: "shup ut. :)"
bob: "shup ut?"
sue: "yeah, you heard me. :)"
sue: "shup ut. :)"
bob: "shup ut?"
sue: "yeah, you heard me. :)"
by cavewomanmanman February 18, 2011
shutup fused into one word is shup, thus shup cow is a phrase directed to a fat shit like lati grant.
by fatshitsheevadijondrivemalarek11507john deereetc October 14, 2006
by Sisko September 10, 2005
by Trace Natey January 25, 2010
by s2kbaby June 25, 2011