- a person who abandons or betrays his or her party or associates, especially in a time of trouble.
- an informer.
- a scab laborer.
verb (used without object), rat·ted, rat·ting.
- to desert one's party or associates, especially in a time of trouble.
- to turn informer; squeal: He ratted on the gang, and the police arrested them.
- to work as a scab.
verb (used with object), rat·ted, rat·ting.
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Idioms for rat
Origin of rat
OTHER WORDS FROM ratrat·like, adjective
Example sentences from the Web for rat
In one study from 2006, surgical residents learning to splice tiny blood vessels in rats were trained in either a spaced sequence — one session a week, for four weeks — or all at once, blasting through all four sessions in a single, “massed,” block.Cramming may help for next-day exams. But for long-term memory, spacing out study is what works.|Sanjay Sarma, Luke Yoquinto|November 30, 2020|Washington Post
He had known that his mother, Sandy Quimby, a half-hour away in Eagle River, was a pack rat.Smallest health providers face biggest problem finding protective gear amid coronavirus surge|Amy Goldstein|November 22, 2020|Washington Post
The researchers then removed the rats from the pen for five minutes and swapped the locations of two objects.
We saw that it actually reduced heroin-seeking behavior in the rat model.How Are Psychedelics and Other Party Drugs Changing Psychiatry? (Ep. 433)|Stephen J. Dubner|October 1, 2020|Freakonomics
Of the 50 survey responses from North America, 53 percent reported they were getting more calls about rats, and 88 percent reported more new rat-related clients.The ‘ratpocalypse’ isn’t nigh, according to service call data|Bethany Brookshire|July 14, 2020|Science News
I have no idea if he is the “friend” who ratted me out to Joseph Nye.
“I ratted on the Aryan Brotherhood,” said former member Sullivan.What’s So Scary About the Texas Aryan Brotherhood? Take a Look at the Indictments|Christine Pelisek|April 3, 2013|DAILY BEAST
But every so often he mutters that he’ll get even with someone by the name of Otto—a fellow sailor who ‘ratted.
Only about that dreadful Mr Trenchard; you know the reason why he ratted?Sybil|Benjamin Disraeli
If claims are ratted it is said there are strangers about, and the miners deal with rats according to their own ideas of justice.The Black Opal|Katharine Susannah Prichard
Matthew, we know, played the traitor; and though Mackworth ratted to my own side, I fear it must be confessed that he did rat.Essays in English Literature, 1780-1860|George Saintsbury
You remember how Anchor Joe talked about someone who had ‘ratted’?
British Dictionary definitions for rat
verb rats, ratting or ratted
- to divulge secret information (about); betray the trust (of)
- to default (on); abandonhe ratted on the project at the last minute
Derived forms of ratratlike, adjective
Word Origin for rat
Medical definitions for rat
Idioms and Phrases with rat
In addition to the idioms beginning with rat
- rat on
- rat race
- like a drowned rat
- smell a rat