1. "Dude, did you just nuke that bathroom?!"
"Yep. I made a poopsplosion."
2. "If we don't pull over to the nearest rest stop in the next two minutes.. Oh god.. I'm gonna have the poopsplosion of the century. Jesus, I'm sorry for eating all them bean burritos last night.."
When you are sweating to go to the bathroom, and you have a bad case of the explosive diaherra. You accidentally explode from the rectal area on your sprint to the lavatory.
when your holding in a poo for soo long and it just lets go all at once and theres poo everywhere or when you let your poo go as your running thus going everywhere