Top Definition
A mountain dew like beverage purchased in the middle east. Normally doesn't contain artificial citrus flavors, but instead contains actual orange juice.
Seaman: Yo Boats wheres the vending machines in this hell-hole? i could use a cold mountain dew right now.

Boats: Go to that little corner store, not exactly mountain dew, but better, a "Derpa Dew".

Seaman: What's a Derpa Dew?

Boats: Just try it, go ask the corpsman for some zantac before you do, it's a delicious bottle of heartburn.
by thesteveonator May 11, 2011
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