The unfortunate series of events when you're sitting down to poop, and you fart just after pulling down your pants and before you sit down, leading to sitting with your head in a fresh and full-strength cloud of your own ungodly stench.
During my bathroom emergency after taco Tuesday, I had a Lemony Shitsit so fresh I wanted to puke.
A trip to a grocery store, convenience store, or gas station for the sole purpose of buying an excessive amount of junk food and sugary drinks, usually with friends. A chud run often happens late at night and ends with everyone involved hating themselves afterwards.