When a "Baby on Board" sticker is a little faded and beat up, you know the kid is at least a year old, and the car is safe to ram.
Aged Baby on Board Sticker
Categories
Explanation
Experiment
Explain Bear
Listen up, buttercup. The joke is about how people with "Baby on Board" stickers on their cars are probably safe drivers because they have a baby in the car. But if the sticker is old, that baby is probably not a baby anymore, so who cares about ramming them? Now, go back to drooling on your keyboard or whatever it is you do.