Top definition
A contraction of the word something. Usually used in chat rooms or games. Can also be said out to save time while talking.
In a chatroom: Duh, tell me sumn I don't know.

While speaking: My boss told me to sumn and throw it away but idk what.
by 2v December 05, 2005
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Cleveland Steamer Plush

The vengeful act of crapping on a lover's chest while they sleep.

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2
"SUMN, and watch the movie."
by CalebTheKidMC March 08, 2016
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Dirty Sanchez Plush

It does not matter how you do it. It's a Fecal Mustache.

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