The practice of stretching and deepening the navel, creating an artificial pouch (a vuckle) for purposes of storage, smuggling, and sexual gratification.
Often, artists licensed in pandoto have even stricter standards than states or cities, requiring at least one sexual partner to be present to verify correct omphalometrics.
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?"