If you were a driver, what funny slogans would you put on the back of the car?

It's best to stick a paper LCD screen, so you can write down what you want to say to the car behind you at any time.

For example, the guy in front drives slowly when there is a road. You can see you talking on your cell phone when you overtake. Drive in front of him and put "SB" on the LCD screen for him to see. It's a vent in my heart.