What Would Paul Mescal Tattoo?

You can thank Masters of Air actor and fellow Irishman Fionn O'Shea for sharing these two photos of Paul Mescal in just underwear and socks while getting some sort of tattoo on his arm -- hmm I wonder what the tat is of? Perhaps it's MNPP's web address in gigantic block letters. That's my guess. What's yours? Tell me in the commnets!