Kailtail
A stupid, loud, and smelly way to tell someone you're mad at them for going slow. You ride so close to their back bumper it feels like you're about to breathe on their tailpipe.
My mom did a Kailtail to me because I was going 25 mph in a 40 zone.
I got a Kailtail from my friend because he saw a green light and I was still going slow.
The guy behind me did a Kailtail so bad I thought he was trying to make me crash.