Bumper sticker - 12

Three times in the past week, I’ve seen this bumper sticker and I was wondering what it means. It’s a white 12 on a black diamond. The diamond has a white outline and is on a black background. The sticker is about 3" x 3". The cars have had other liberal/atheist bumper stickers alongside this one (one car had a darwin fish, a flying spaghetti monster “fish”, and the 12).

Anyone have any idea?

It has to do with the Outer Banks in North Carolina, which appears to be a popular surfing/beach community.

link

Thank you! Makes sense - I’m in North Carolina. Apparently, a lot of liberal atheists around here surf. Huh.

Well, the Christians don’t need boards - they just walk
(or part)