pretending to be something you're not, lying or acting in order to deceive others
Some gay guys go rogue sometimes. They act like a couple of normal guys shopping for beer and pizza, but they're not fooling anybody with that "O" magazine in their cart.
To cease to follow orders; to act on one's own, usually against expectation or instruction. To pursue one's own interests.
The priest joked that he wrote his sermons not to interest the worshipful, but to rebuke those who were tempted to go rogue.