Origin: Pseudo-latin, used in learned social circles in Oxford University as humor, slang for "wit" or "pun" jokes, first known use 1596. Basically, answering a question with a pun, riddle, or joke. More modern usage generally refers to a difficult or complex riddle.
(In biology lab) Jim: "Hey John, I was disecting this robin, and I seem to have misplaced it's head. Have you seen it?"
John: "There you go, with your bird-brained schemes, methinks you have lost your mind!"
Jim: "Would you stop your silly conundrums and beak-flapping and help me find my dearest robin!"