A belief that format or form-factor is the primary determinant of performance, efficacy, and other traits and that format or form-factor differences produce an inherent superiority of a particular format or form-factor.
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.