The phrase "back piece" typically refers to a large tattoo that covers a person's entire back.
Sentences with «back piece»
While there are many situations where you should be self aware and not behave like a child, bringing back a piece of childhood and taking life less seriously is incredibly refreshing. (mikialamode.com)
Everyone loved it and was hard to save back a piece for leftovers! (simplyrecipes.com)
With right sides facing, lay the two back pieces on top of the front piece, matching outer edges. (gluesticksblog.com)