Beer breakfast is related to a common morning ritual of single males known as dreakfast, the consuming of leftovers from last night's dinner for breakfast. Beer is often a part of this meal. Women tend to find it repulsive.
While you make the pancakes and get out the brew for beer breakfast, I'm going to snack on cold pizza from last night's party for dreakfast.
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.