1 definition by BellyEnthusiast69420
an in-betweenie belly button; the mixture of an outie (belly button) and an innie (belly hole); belly button + belly hole = belly butthole.
Person 1: “Do you have a belly button, belly hole, or a belly butthole?” Person 2: “Well, I have an in-betweenie... so, a belly butthole!”
by BellyEnthusiast69420 June 20, 2020