I had a good laugh because obviously this is an amateur move: "I'm 21 Baby" was written on the back window of a pickup truck. Whoever has this truck is obviously excited to turn 21 (the legal drinking age in every state in the U.S.). If you're going to go out and celebrate, you're asking for attention from the police.
Happy 21st birthday to whoever you are, and I hope you don't get a DUI.
|"I'm 21 Baby" written on a neighbor's pickup truck
which translates to "Please stop me to check if I'm drunk"