Kailtail
A dirty, loud, and mean way to bother someone for going slow. You ride so close to their bumper it feels like you're going to ram into them just to make a point.
My cousin did a Kailtail to me because I was going 30 mph in a 55 zone.
Kailtail happened when my teacher tried to drive home and I was behind her like a crazy person.
The guy behind me did a Kailtail so bad he almost made me swerve into the next lane.