no skin off (one's) back(redirected from no skin off their backs)
no skin off (one's) back
No cause of concern or interest to one; no source of difficulty, threat, or risk. Hey, it's no skin off my back if you want to get a tattoo. I'm just saying that it's something you may regret someday. A: "Do you mind if I store some of my stuff in your garage for a while?" B: "Eh, it's no skin off my back."