Ya boooiii Matt Heafy (guitar & vocals of Trivium) has been on a quest - an expensive one, I'm sure - to get his whole body tattooed. He's been getting tatted since 2005 (the precious Ascendancy days) and his body suit is almost to completion.
What's been inked? His back, legs, arms, and cheeks - as in, the buttocks. Most of the artwork is Japanese. Dragons, geishas, and any other subject matter you've likely seen on Ink Master episodes.
Read parts of Heafy's explanations here: