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 small piece of information. Derived from the word ken, used often in the scottish language and is synonymous with knowledge.
Person 1: "Hey I don't get this shit. How do you solve this problem?"
Person 2: "I got that one. Give me some kenlets on this assignment and I'll help you w/ that one."