Underworld Related Tattoo

[verbal]

I've been ready for another tattoo for some time now. I have a few ideas I'm throwing around but none are set in stone yet. It got me thinking, what would be a good underworld related tattoo?

Just getting "underworld" would be cheesy and I'd probably punch people from all the movie comments.

I figure something like a symbol that represents UW, I just can't think of any. Maybe a line or two from a song, but I love all their lyrics. It would be too hard to choose.

Any ideas?