• noun:   any of various long-tailed rodents similar to but larger than a mouse
• noun:   a pad (usually made of hair) worn as part of a woman's coiffure
• noun:   one who reveals confidential information in return for money
• noun:   a person who is deemed to be despicable or contemptible

  Example: "Kill the rat"

• noun:   someone who works (or provides workers) during a strike
• verb:   employ scabs or strike breakers in
• verb:   desert one's party or group of friends, for example, for one's personal advantage
• verb:   catch rats, especially with dogs
• verb:   give (hair) the appearance of being fuller by using a rat
• verb:   take the place of work of someone on strike
• verb:   give away information about somebody

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