(~s)
If you say that someone is a ~, you are criticizing them because they are very strict and demand that people obey their rules and orders. (FORMAL)
He’s a retired Lieutenant Colonel and a bit of a ~.
N-COUNT disapproval
MARTINET
Meaning of MARTINET in English
Collins COBUILD. Толковый словарь английского языка для изучающих язык Коллинз COBUILD (международная база данных языков Бирмингемского университета) . 2012