As the nomenclature bourgeoned, so did the practice. Though the act of sharing one’s perky backside has been around since Instagram’s early days, the term has only recently become the new normal in our feeds.
It’s the definition for what happens when a lovely lady snaps a saucy photo of her exposed booty, posts it to Instagram, and drives the world wild. The belfie is a delightful portmanteau of butt and selfie.