Atomic Cocktail

 is a consumable item in Fallout: New Vegas.

Characteristics
When consumed the player is resistant to fire and energy and SLP is greatly reduced (H2O is increased), but it also gives +8 to radiation. This item is made at a campfire. It requires: Mentats (1), Nuka-Cola Victory (2), vodka (2), and wine (1).

Locations

 * Klamath Bob's Liquor Store (2) - In wooden crate behind store counter.
 * Occasionally found on dead Legionaires.
 * Lucky 38 Presidential Suite (3) - In one of the fridges the first time you enter.

Behind the Scenes
It is likely a reference to the song Atomic Cocktail by the Slim Gaillard Quartette.