the passage in the Bible that Sammy references was a directive against the ways of Pagans who, as part of their form of worship, would paint their bodies.
God, it would seem, needs a clear shirts vs. skins concept in deciding who is naughty and who is nice.
But, if you are getting a tattoo as part of worshipping another god, God might take issue with you. Skull with dagger stabbed through the top with snake slithering through the eyes...he'd probably just give you a

.