The act of penetrating or attempting to penetrate the anal orifice of any living creature and occassionally inanimate objects such as toilet paper roll tubes or small dead children.
"Would you mind if I Lance Wackerle your ass, I'm feeling kinda sexy".
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.