Cursed rubber chicken (3.5e Equipment)
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This item looks like a normal rubber chicken, but when it is picked up the item is bounded to the individual who grabbed it. Item can be dropped, hidden, destroyed, but will reappear almost instantaneously (Depending on the DM), and usually in an inconvenient way (i.e. appears in hand when trying to intimidate, or in mouth whenever trying to charm someone, etc). Usually in a treasure chest with other cursed items.
This item originally appeared to annoy an over zealous dwarf. It was the only way to keep the player from acting like his character is the only one in the campaign. This allowed the DM to actually shut him up when necessary