How is a person who has the hair growing the wrong way?
Context: London mid 19th educated guy speaking:
«Charles' old friend must have the hair growing the wrong way»
and then explains some proffesors' dispute.
It could also be "contrary" thinking or acting.
Everyone thought the earth was flat but he had his hair growing the other way and thought it was round.
Would anybody please confirm that this is not a regular, common, idiom?