martinet
A strict disciplinarian.
Captain Edward Carlisle, soldier as he was, martinet as he was, felt a curious sensation of helplessness seize upon him as he met her steady gaze, her alluring smile ; he could not tell what this prisoner might do.
Anyone who lays stress on a rigid adherence to the details of discipline, or to forms and fixed methods or rules.
figuratively
Before I met Mr. Bowen Cooke I had been given to understand that he was of a reserved nature, and on occasion could be a "bit of a martinet"; [...].
A short whip with multiple lashes once used in France.
historical
Where it comes from
After the example of 17th-century French army officer Jean Martinet.
Adapted from the Wiktionary entry martinet (CC BY-SA 4.0).