hardhat

or hard-hat (härdˈhătˌ)

1. a. A lightweight protective helmet, usually of metal or reinforced plastic, worn by workers in industrial settings.
   b. Informal A construction worker.
2. Slang
   a. An ultraconservative.
   b. An extremely patriotic person with a conventional, usually unquestioning sense of morality.

1. Relating to heavy industry, construction, or demolition.
2. Informal Of, relating to, or characterized by extreme conservatism.
3. Slang Extremely patriotic.