Here's another tattoo from Rate My Ink. Artist unknown.
This is Odin, the big boss of the Norse pantheon, hanging from Yggdrasil, the World Tree. Odin is one of those fascinating deities who rule over war and violence as well as poetry, prophecy and magic. By hanging from the tree Odin gained power over the nine worlds, gained the knowledge of the eighteen runes as well as nine magical songs.