Tattoo area names? (Chest piece, tramp stamp, etc)?

Well, you just call it according to placement, pretty much. Chest piece, upper thigh tattoo, shoulder piece, ankle tattoo... etc. 'Tramp stamp' is a derogatory slang term for a female lower back tattoo, kept in usage by narrow minded geeks who aren't getting any, and a few hateful women who don't have the figure for 'em.