A deliberate misuse of the word "obviously" used with lashings of irony and/or sarcasm. Used in its purest form, it should sound to the other person as though you are agreeing with what they are saying but to anyone with half a brain the opposite is true. It is a perfectly acceptable response to someone who has just said something utterly stupid.
"Look, it wasn't my fault I wrote off the car. They should never have put a goddamn telegraph pole there in the first place!" "Odviously"
A specific form of chicanery. Pretending to be a made up personality, usually just for the hell of it but sometimes with a view to carrying out a con or other criminal ruse.
"People reckon Bruno and Borat are original, but it's just McCainery"
"He told me he'd come to read the gas meter but when he'd gone so had my jewellry box" "That's not just chicanery, that's criminal McCainery"