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Noun: rat  rat
  1. Any of various long-tailed rodents similar to but larger than a mouse
     
  2. [informal] A person who is deemed to be despicable or contemptible
    "kill the rat";
    - rotter [Brit, informal], dirty dog [informal], skunk [informal], stinker [informal], stinkpot [N. Amer, informal], bum [N. Amer, informal], crumb [N. Amer, informal], lowlife [informal], scumbag [informal], so-and-so [informal], git [Brit, informal], slimebag [informal], slimeball [informal], toad [informal], sleazeball [informal], scuzz [N. Amer, informal], scuzzbucket [N. Amer, informal], toerag [Brit, informal], scuzzbag [N. Amer, informal], sleazebucket [informal], sleazebag [informal], dirtbag [US, informal], swine [informal], ratbag [Brit, informal], scuzzball [N. Amer, informal], sod [Brit, informal]
     
  3. [informal] One who reveals confidential information to the police or other authority
    "The mafia liquidated the rat";
    - informer, betrayer, squealer, blabber [informal]
     
  4. [informal] Someone who reports another person's wrongdoings to someone in authority
    "I told the teacher that I'm not a rat and didn't want to get involved";
    - telltale [Brit, informal], grass [Brit, informal], snitch [informal], tattletale [US, informal], talebearer [archaic], squealer [informal]
     
  5. [informal] Someone who works (or provides workers) during a strike
    - scab, strikebreaker, blackleg [Brit]
     
  6. [US] A pad (usually made of hair) worn as part of a woman's coiffure
Verb: rat (ratted,ratting)  rat
  1. Catch rats, especially with dogs
     
  2. [informal] Give away information about somebody
    - denounce, tell on, betray, give away, grass, shop [informal], snitch [informal], stag, squeak [informal]
     
  3. [informal] Desert one's party or group of friends, for example, for one's personal advantage
     
  4. [informal] Employ scabs or strike breakers in
     
  5. [informal] Take the place of work of someone on strike
    - fink [N. Amer, informal], scab, blackleg [Brit]
     
  6. [US] Give (hair) the appearance of being fuller by using a rat

Derived forms: ratted, rats, ratting

Type of: capture, catch, defect, desert, disagreeable person, do work, employ, engage, fill out, gnawer, hire, inform, informant, pad, rodent, source, unpleasant person, work, worker

Part of: coif, coiffure, do [informal], hair style, hairdo [informal], hairstyle

Encyclopedia: Rat, Missouri