ratter

• 指不忠诚的人，背叛或抛弃自己的事业、宗教、政党或朋友的人；也指捕鼠的动物（如捕鼠犬或捕鼠猫）。

A noun referring to a disloyal person who betrays or deserts their cause, religion, political party, or friends.

1. Disloyal personC1informal

   A person who betrays or deserts their cause, religion, political party, or friends.

   叛徒

   • He was branded a ratter after he informed on his colleagues.
   • The group expelled the ratter who leaked their plans.
   • No one trusts a ratter who abandons their allies.

   同义词apostatebetrayerdefectordeserterdouble-crosserinformerratrenegadesnaketraitorturncoat

   反义词adherentdefenderfollowerloyalistpatriotsupporter

2. Rat-catching dogB2formal

   Any of several breeds of terrier developed specifically to catch rats.

   捕鼠犬

   • The farmer kept a ratter to control the rodent population.
   • This terrier is an excellent ratter, quick and fearless.
   • Ratters were historically bred for their hunting instincts.