Snakeater

Snakeater is a Fallout, Fallout 2, Fallout Tactics and Lionheart Perk.

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.