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1.
short for the word "something"
Josh: ur up to sumat l8r m8?
Matt: yea sure dude
by Vow Of SIlence April 05, 2005
 
2.
Shut. Up. Men. Are. Talking
John: BBQ is awesome
Jack: agreed
Girl: what?
John, Jack (in unison): SUMAT!
by Dr. sammitch February 10, 2010