vermin/ˈvɝmɪn/EtymologyFrom Middle English vermyn, vermyne, from Old French vermine, from Vulgar Latin *verminum (“vermin”), collective noun formed from Latin vermis (“worm”). Compare vermiculate and vermivorous. See also worm.nounAny of various common types of small insects or other animals which cause harm and annoyance.“The area was crawling with all sorts of vermin: fleas, lice, mice, and rats to name a few. Thus, we felt as if vermin were crawling over us.”An animal that preys on game, such as a fox or a weasel.An obnoxious or mean and offensive person.“Bring these vermin to the Palace of Justice.”