exclam. Go ahead, do what you are going to do, and I will be very happy to do what I have to do! (A cliché said typically by a movie police officer who has a gun pointed at a criminal. The police officer wants the criminal to do something that will justify pulling the trigger, which the police officer will do with pleasure. Used in real life in any context, and especially in sarcasm.) Move a muscle! Go for your gun! Go ahead, make my day!