An almost rhythmic dance done by a toilet bowl user who is about to lose control of his or her bowels. This usually happens when one's belt will not come undone at the anticipated rate, and panic sets in, as a bowel movement is immenent.
Whoo, that was close. I almost crapped my pants last night. I barely made it to the bathroom, and was doing the buckle shuffle, right before I blew mud all over the toilet!
A case of raging diarrhea normally resulting in the performance of a "buckle shuffle" done at the helm of a toilet, after eating spicy food.
Oh man, I ate those hot BBQ potato chips and couldn't leave the house, because they gave me a case of Mississippi Quick Step. I almost didn't make it, as my belt hemmed me up when I was doing the buckle shuffle in front of the toilet!