A way to say thicc ass but with no profanity. The thicker it is the more bums u add.
Prabh: Yoo! Aaliyah sent pics of Nathan’s bumbum!
Aaliyah: Yeha he was hella thicc you could call it a bum bum bum!!
bUM bUM bE dUM bUM bUM bU dUM dUM
Rihanna: Bum Bum Be Dum Bum Bum Bu Dum Dum