Top Definition
Hillbilly saying meaning “You aren’t supposed to”.

A word heard often during my Arkansas upbringing.
The "B" sound is often a result of a lipful of Skoal

Skoal-less pronunciation: Y'aintposta
Y'aintboasta eat that.

Y'aintboasta open that when it's hot.

Y'aintboasta touch Jasper's tools.
by KyleRawks November 15, 2011

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