Refers to the discoloration, usually grey or brownish color around the anus. Bungarungus can most often be seen in pornograpic magazines and low budgetporno films.
"Wow, did you see the bungarungus on that girl in Hustler this month?"
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.