Snakeater

Snakeater is a Fallout, Fallout 2, Fallout Tactics and Lionheart Perk.
 * Requirements: Level 6 (5 in Lionheart), EN 3, cannot have Venom Ward Perk (in Lionheart)
 * Ranks: 1 (Fallout) or 2 (Fallout 2, Fallout Tactics, Lionheart)
 * Benefit: Yum! Tastes like chicken. You have gained an immunity to poison, resulting in a +25% (30% in Lionheart) to your Poison Resistance.

Trivia
This is likely a reference to the third part in the series called Metal Gear Solid, Operation Snake eater.