Dragons, Angels, Stars. Tattoo conventions and tattoo parlor listings. Many tattoo flash designs, both real tattoos and fake tattoos.
The history of this tat might have looked something like that:
"Hey dude, we're soo wasted, let's tattoo something"
"Like, I don't know, wooooow, a skull, skulls are cool"
"Yeah, but normal skull is boring ... let's have a .... [dumdumdum] a skull bong"