Rat

Noun

  • (zoology) A medium-sized rodent belonging to the genus Rattus.
  • (informal) An informant or snitch.
  • Scab.
  • (informal) A person who is known for betrayal; a scoundrel; a quisling.

    "What a rat, leaving us stranded here!"

  • (slang) A person who routinely spends time at a particular location.

    "He loved hockey and was a devoted rink rat."

  • A wad of shed hair used as part of a hairstyle.
  • (informal) A term indiscriminately applied to numerous members of several rodent families (e.g. voles and mice) having bodies longer than about 12 cm, or 5 inches.
  • (slang) A person who routinely spends time at a particular location.

    "Our teenager has become a mall rat."

  • (north-west London, slang) Vagina.

    "Get your rat out."

Verb

  • (usually with “on” or “out”) To betray someone and tell their secret to an authority or an enemy; to turn someone in, bewray.

    "He ratted on his coworker."

  • (of a dog, etc.) To kill rats.
  • (usually with “on” or “out”) To betray someone and tell their secret to an authority or an enemy; to turn someone in, bewray.

    "He is going to rat us out!"

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