A combination of the terms "dirtbag" and "douchebag". used as a codeword by women to describe men who are scummy and have surpassed the levels of jerk and asshole.
That guy is such a total dirche I can't believe he would sleep around with all those girls when he has a girlfriend.
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.