YumYum Sheriff is a Legends of Idleon item: quest reward.

YumYum Sheriff | Idleon Toolbox

YumYum_Sheriff

Have_the_YumYum_Sheriff_trophy_equipped,_while_also_having_another_in_your_inventory.

Made up of all the tokens that you collected after completing an NPC's entire questline. DONT SELL THIS ITEM

Proof that you mastered the art of the Fishing, Alchemy, and Catching skills. DONT SELL THIS ITEM

Proof that you collected all the coolest and rarest items that Yumyum Desert has to offer! DONT SELL THIS ITEM