A person who excessively emphasizes or deals in duties, obligations, or responsibilities.
From duty + monger (one who deals in or promotes something). Monger comes from Old English 'mangere' and Old Saxon 'mangari,' related to 'mang' meaning to mix or trade.
This is a delightfully sarcastic word—imagine calling someone a 'dutymonger' the way you'd call them a 'fearmonger'—someone who won't stop reminding you what you're supposed to do!
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