"rats" in the noun sense
any of various long-tailed rodents similar to but larger than a mouse
2. scab, strikebreaker, blackleg, rat
someone who works (or provides workers) during a strike
3. rotter, dirty dog, rat, skunk, stinker, stinkpot, bum, puke, crumb, lowlife, scum bag, so-and-so, git
a person who is deemed to be despicable or contemptible
"only a rotter would do that"
"kill the rat"
"throw the bum out"
"you cowardly little pukes!"
"the British call a contemptible person a `git'"
4. informer, betrayer, rat, squealer, blabber
one who reveals confidential information in return for money
a pad (usually made of hair) worn as part of a woman's coiffure
"rats" in the verb sense
desert one's party or group of friends, for example, for one's personal advantage
employ scabs or strike breakers in
3. fink, scab, rat, blackleg
take the place of work of someone on strike
give (hair) the appearance of being fuller by using a rat
catch rats, especially with dogs
6. denounce, tell on, betray, give away, rat, grass, shit, shop, snitch, stag
give away information about somebody
"He told on his classmate who had cheated on the exam"
Source: WordNet® (An amazing lexical database of English)
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