John, I believe you are being rather flippant now. Which is to say that you are marked by disrespectful levity or casualness, you pert little thing, you.
(adj.) Disrespectfully casual or lighthearted, particularly when someone or something is serious. Usually people behave like this when they honestly couldn't care less about a situation.
Marie: "Did you see the way John turned up at Uncle Freddy's funeral? He was wearing a wifebeater, jeans, and freaking pink slippers."