I sure hope you aren't looking for these... Please tell me you're not looking for these.
This sticker means that you are an elderly driver and other drivers should exercise caution around you.
This sticker means that you are an beginner (or young) driver and other drivers should exercise caution around you.
I used to see a few people running around in Seattle with these stickers on their cars thinking that they were "MAD JDM YO!" until I explained to what they meant.
Scott