日本語WordNet
any of various long-tailed rodents similar to but larger than a mouse
someone who works (or provides workers) during a strike
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'"
one who reveals confidential information in return for money
take the place of work of someone on strike
give away information about somebody; "He told on his classmate who had cheated on the exam"
JMdict
AIによる解説
A noun referring to rodents, especially large rats like brown rats. Figuratively used as slang for 'traitor,' 'informer,' or 'coward.' Featured in many idioms like 'smell a rat' (sense something suspicious) and 'rat race' (fierce competitive society).
ライセンス: KeyLang Original