- A lightweight protective helmet, usually of metal or reinforced plastic, worn by workers in industrial settings.
- Informal A construction worker.
- Slang An ultraconservative.
- Slang An extremely patriotic person with a conventional, usually unquestioning sense of morality.
- Relating to heavy industry, construction, or demolition.
- Informal Of, relating to, or characterized by extreme conservatism.
- Slang Extremely patriotic.