The in-game description is rather vague, but basically Meats double your attack power when used against an enemy of the same Type. Meats also double your defensive power against enemies of the same Type. For example, Rabites are of the Type, Fauna. Use an Animal Meat and you will do double damage to Rabites and the damage that they can do to you will be cut in half. This includes both physical attacks as well as magical attacks. Critical Hits may also still occur (or you could cast PowerUp or get Best Status), so you have a chance of doing up to 4 times the normal damage against an enemy! The effects of Meats lasts until you leave the screen.