ba-dump-a-dump - When you’re so desperate to poop that your butt starts doing

When you’re so desperate to poop that your butt starts doing the cha-cha and you can’t stop it.

I did the ba-dump-a-dump in my pants during math class and got sent to the office.

My brother did the ba-dump-a-dump in the car and the whole family started laughing at him.

My mom did the ba-dump-a-dump on the kitchen counter and spilled the coffee.