Kermie here has the funny habit of doing this silly wiggle every time he's done with the litter box. His owners started calling it the "Kermie Butt Dance" and, well, it stuck. (Although I'm sure there's nothing stuck on Kermie's butt anymore... Just sayin.)
How about a dancing elephant next, please!
P.S. I know that butt-dragging can be a sign of worms, but it sounds like Kermie does this really as a way of wiping his little kitty butt! Haha. His owners say they clean the carpet every day. ;)
P.P.S. Special thanks to Cute's friend (and @Quadpawd's mommy!) Angie for sending us this cute video!