What Does Iron-Nerves Mean?

: an impressive ability to remain calm in dangerous or difficult situations It takes nerves of steel to work in such a high-pressure job.

Who has nerves of steel?

If someone has nerves of steel, they do not get nervous or frightened even in very difficult or dangerous situations. You need nerves of steel in this business and I've got them.

What does it mean to have nerves?

Definition of 'have a nerve'

If you say that someone has a nerve or has the nerve to do something, you are criticizing them for doing something which you feel they had no right to do. [informal, disapproval] He told his critics they had a nerve complaining about him.