An alcoholic beverage that consists of half of a can of un-carbonated Dr. Pepper and 1 shot of rum that is atleast eighty proof, sometimes with a slice of lime. Nuka cola is traditionally served at room temperature, however chilling or pouring over ice is not uncommon.

Nuka - Cola is the drink of the post nuclear world. It is addictive and is drank flat and warm.
Nuka Cola is drank in the wastelands of the fallout series (rpg)