An exaggerated way to say the already chock-full-of-attitude "obviously". Also, used with more masculinity and aggressiveness. Stems from both California and New Jersey, where men with too much testosterone would mix up their words while trying to talk like valley girls.
Dennis: Hey, check out the lady lumps over there!
James: What, on that old statue?
Dennis: Boviously.
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.