Padonk
A super round butt that wiggles like a jelly donut. It can also be the loud, bouncy sound of a butt moving like it’s trying to escape.
My cousin's padonk is so big, it looks like it's gonna take flight.
She twerked so hard, I heard a padonk in the next town.
He tried to sit down, but his padonk made a loud boom.