From a popular song by Pearl Bailey in the early 1950's.
A dishonest, shady person, or scam artist who has found his mate, who complements each other's undesireable behaviour.
Don't blame him only for cheating the old woman out of her money, his wife helped. It takes two to tango.
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.