That's why you have a friend in the United States send it to you as a gift. Gifts under $20 are usually duty-free, right?

It's near impossible to wade through all the things that have already been posted, but in case you're looking for a visual library of inspiration, I recommend checking out evolutionary biologist/science writer Carl Zimmer's Science Tattoo Emporium: http://blogs.discovermagazine.com/loom/category/science-tattoo-emporium/

My question: what if that tense scenario is that you are likely to be eaten by a grue?