Akademik

Cf: Am I my brother's keeper? (Am., Br.). I am not my brother's keeper (Am.). I'm a stranger here (Br.). It's no dirt down my neck (no hair off my head) (Br.). It's no skin off my back (Am., Br.). It's no skin off my butt (nose, tail) (Am.). It's no sweat off my back (Am.). That's no business of mine (Am., Br.). That's no skin off my teeth (Am.). That's not my street (Br.). What have I to do with Brawshaw's windmill? (Br.)