A: Where’s John?

B: I don’t know. I haven’t seen hide nor hair of him all day.

Note: This idiom means “not to see any trace or evidence of someone or something.” “Hide” here means “skin.” There was an ancient saying “in hide and hair,” which means “wholly, entirely.” Therefore, “not see hide nor hair of” means “nothing whatsoever.” For example: After nearly two weeks in Australia, I haven’t seen hair nor hide of a kangaroo.