Will the Code Hold?
[[xref:http://www.pcworld.com/article/164194-6/the_geek_chic_checklist_22_sure_signs_youre_a_geek.html|Know HTML?|The Geek Chic Checklist -- 22 Sure Signs You're a Geek]] Check. Think you’re cleverly ironic? Check. Want to be reminded of your knowledge of HTML and your clever irony in 30 years? Check.
Enter the HTML tag tattoo.
Just imagine him trying to explain, in a few decades, exactly what an "HTML tag" is, and why it's subsequently clever.