The proper usage would be for example...when watching a football game " What's up with the team today, they're all dragging ass out there They must have been up all night drinking and drilling skanks before the game!"
A mythical creature, friendly in nature, who comes to visit one several hours after one consumes spicy foods - making one's butthole feel as though it were shooting out fire while one defecates. The Ass Dragon's friendly, playful nature often makes him want to hang out for hours, sometimes hiding for a little while, peek-a-boo-style.
One more jalapeño slice would just be inviting the Ass Dragon and I don't have time to have my ass feel like it's on fire every hour tomorrow as I am addressing the Supreme Court in a very important case.