A device used to stretch ones navel to a desired gauge, either for the purposes of being enjoyed as an alternative copulatory orifice OR for the creation of a pouch used to smuggle drugs, weapons, etc. into prisons, high schools, and airports. May also be used to refer to such a modified belly button.
some gay guy: "Ouch ouch!! Not so fast--you KNOW I have a small vuckle!"
other gay guy: "That's not the only thing that's small on you, sugar, are you even IN my vuckle?"