This is a shortened contraction of Shouldn't and Should Not. It usually is used by those with a southern-like accent or anyone making an accent on the words.
Tanor: Hey, UMG blocked meh from seeing this video. It says tis not available in my country. But why? I'm from the US. I shon't be having this problem! =(

Dash: You might have to renew yer internets...

Tanor: Aww man.
by Tanor Faux January 16, 2011
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Should but won't do something
I shon't help you find your phone
by Snatcha April 18, 2008
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meaning: for sure I won't; definitely not.
Like how white people say "Girl are you gonna give yo'nigga money ?"

"FA SHON'T!!"
by Aeoncat July 19, 2018
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