Yes, what you're seeing is a tattoo of the Witch-king of Angmar posing like Bettie Page and showing off some toned, sultry gams.
Explains ink-bearer LyfeIsFunni, "This is my LOTR pinup girl. It's on the back of my thigh. It was done by Bob Parr at Jaded Angel in Ames, IA [...] I will be getting a Boba Fett pinup girl on the other leg at the end of this month." One does not simply vamp into Mordor, et cetera, et cetera.