The quality of being a total badass. Examples of people brimming with badassosity are Hiro Protagonist from Neal Stephenson's Snow Crash and Achilles from the Iliad.
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.