It can be used for two different things LIKE: telling people to back back to their goat hole or Also known as a penis, dick, shlonk, Willy, wiener, or a pp.
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.