The Jar of Fly Honey is an item in EarthBound. It is a container of honey made by flies.
Master Belch, one of Giygas's most esteemed minions, enslaves the Mr. Saturns at one point to mass produce fly honey in his Grapefruit Falls factory. Belch, addicted to the honey himself, can be easily defeated by Ness and friends' encounter with him by using the Jar of Fly Honey while in combat. This will cause Belch to spend the duration of the battle eating the honey, paying no attention to the damage he accumulates. The Jar of Fly Honey can be obtained after the defeat of the Boogey Tent in Threed.