Toughened Flesh

Source
This item drops from high-level beasts in Cataclysm-zones, such as: It can also be found in Crate of Tasty Meat which is purchased from Bario Matalli in Stormwind and Shazdar in Orgrimmar.
 * Fleeing Stag in Mount Hyjal
 * Stone Bat in Deepholm
 * Mangy Hyena in Uldum
 * Highland Worg in the Twilight Highlands
 * Frenzied Orca in Kelp'thar Forest
 * Chasm Stalker in the Abyssal Depths

Usage

 * In Cooking:
 * Blackened Surprise
 * In Engineering:
 * inv gizmo fuelcell.png Goblin Barbecue