The type of guy who is a heat-sensitive, horny hypochondriac. Terrible in very hot, blue ball or potentially contagious situations. However, they make for excellent boyfriend and/or husband material.
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.