A person who is intentionally starting trouble, but pretends not to be, is creating Barney Rubble Trouble.
At the football game, Tim belittled the opposing fans by shouting names at them. When the stadium security guard came around, he told Tim to have a good time in the stands, but to not start any trouble. Tim replied, "No trouble, no trouble, Barney Rubble." Tim was creating Barney Rubble trouble because he gave the security guard the impression that he didn't mean to start any trouble when he really did.
by Jerry Y. March 06, 2008