Headbarcode, because i have a barcode tattooed on the back of my head.
Since i've been asked alot over the years: No, i didn't like the movie "Hitman" so much that i ran out and copied his id tag. In fact, I had mine done a couple years before Bruce Willis' character in "Twelve Monkeys".
I got it to symbolize how we are treated like property by our wonderful government. Milked like branded cows for every drop they can squeeze from us.
As i'm writing this, i wonder if my door's about to be kicked in by men in black or maybe a bunch of white-coats with large butterfly nets. Haha!