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A portmanteau of (Mountain Dew and Moonshine). Its a concoction originating in the Southern United States of the popular soda Mountain Dew and moonshine (crudely distilled Ethanol Alcohol). It should be noted that Dewshine has been made with racing fuel containing methanol with deadly consequences.
Papa Jethro: Dammit Jethro, how'd you wreck my car?

Jethro Jr: I went to Billy Bobs and we got all hopped up on Dewshine!
Papa Jethro: Dagnabbit!
by Antblanks January 28, 2016
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A deadly mixture of Mountain Dew and racing fuel. It just killed two teens in Tennessee. If you're here to learn about it, you just learned not to drink it.
Dude A: Hey guys, let's try some dew shine, I heard it gets you mad fucked up.

Dude B: Sure man, let's bring a couple coffins to lie in afterward too! I heard it gets you even more fucked up!

Dude C: I need friends who are less likely to get me killed.
by LifeSavr January 28, 2016
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A wonderful cocktail of racing fuel and Mountain Dew, used by teens in the South.
Hey Billy, wanna go chug some Dewshine with Jimmy and I?
by firstnamelastname January 27, 2016
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