強きょう心しん臓ぞう

noun

boldness; guts; courage; gall; sangfroid

Describes a person who is unflappable, thick-skinned, or has nerves of steel, often in situations that would make others nervous. Can be used admiringly or critically.

• 彼かれは強きょう心しん臓ぞうで、大おお勢ぜいの前まえでも緊きん張ちょうしない。

  He has nerves of steel and doesn't get nervous even in front of a large audience.