An unspecified bodily part of the staple meat of Dwarfs. Has been used in Dwarf cocktails where we would use a cocktail olive, ie, skewered on a stick, and is much the same shape.
A few pointers are given as to which part of a rat's anatomy they originate from, as well as the fact that their loss would be a personal tragedy to the animal, if not for the fact that at the time of harvest, the rest of it is being processed on the butcher's slab as well.
Perhaps fifty percent of the species possesses rat fruit. These were seen to be eaten, with gusto, if not ketchup, by Jewels during her first fateful visit to Shatta.