Well Fed

 is a buff granted to the player upon consuming a Bowl of Soup, a Cooked Marshmellow or a Pumpkin Pie. The buff slightly improves all stats (listed below). This lasts for 10 minutes (15 minutes with the Pumpkin Pie), but can be cancelled at any time by right-clicking the icon.

The following stats are affected:
 * +2 defense
 * +2% critical hit chance on all attacks
 * +5% melee speed
 * +5% melee damage
 * +10% magic damage
 * +10% movement speed

Trivia

 * The  buff and the Clairvoyance buff have the longest duration in the game.
 * Although the buff is granted by consuming a Bowl of Soup made out of Mushrooms and Goldfish, a Cooked Marshmellow or a Pumpkin Pie, the buff icon is of a roast chicken.
 * Well Fed buff may be another in-game reference to the popular MMORPG World of Warcraft, wherein you can also get a Well Fed buff from eating cooked food. It increases specific stats for 10 minutes, the same duration as Terraria's Well Fed buff.