Dewshine is the combination of moonshine with mountain dew. Moonshine contains ethanol(drinking alcohol). Some idiots used racing fuel whith contains toxic stuff like nitroethane and methanol. Methanol is highly toxic and causes blindness, organ failure, and death. Use everclear, vodka, or moonshine for mixing with mountain dew. Don't use racing fuel!

Another definition for dewshine is the discontinued non-alcoholic clear caffeinated beverage called dewshine made by mountain dew.
I mixed mountain dew with moonshine and made dewshine. I drank it and it was delicious! I got buzzed!

Aw man! Too bad they discontinued dewshine!
by HawaiianPunch1 July 3, 2021
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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 28, 2016
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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 mixture of Mountain Dew and racing fuel
Travis drank two cups of dewshine and died
by Wordswithmeaning January 28, 2016
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