- 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
Words nearby rat
Example sentences from the Web for rat
Both groups produced similar hormone spikes when stressed, but in the juvenile rats, levels took much longer to return to normal.Puberty can repair the brain’s stress responses after hardship early in life|Esther Landhuis|August 28, 2020|Science News
The team has already been placing them in rats and primates.Elon Musk’s brain company plans a big reveal on Friday. Here’s what we already know|Verne Kopytoff|August 27, 2020|Fortune
Other researchers studied what happens when adolescent rats move into “enriched” environments.
Blueberry-fed rats spent almost 70 percent of their time exploring the new object, as expected of animals that recognized the old object.What will astronauts need to survive the dangerous journey to Mars?|Maria Temming|July 15, 2020|Science News
Even if they find your trash can instead, he adds, “that’s necessarily going to support fewer rats.”The ‘ratpocalypse’ isn’t nigh, according to service call data|Bethany Brookshire|July 14, 2020|Science News
One rat had once fallen on his head, he said, during a rat raid of a local home.
Since rat root comes from a plant that grows on the edge of the lake there are concerns that the plant is carrying toxins.
Chief Adam offers us some of the local medicine called rat root.
The episode includes satirical images of crime-ridden, rat-infested slums overrun by child-biting monkeys.Mr. Simpson Goes to Washington: How Homer Influenced Politics|Asawin Suebsaeng|August 27, 2014|DAILY BEAST
A cabin filled with the Rat Pack and the ladies who loved them.
Next morning Judy shouted that there was a rat in the nursery, and thus he forgot to tell her the wonderful news.
He had repeated till he was thrice weary the statement that "the Cat lay on the Mat and the Rat came in."
Growling horribly, the enraged brute seized poor Pearson and shook him as a terrier dog shakes a rat.Hunting the Lions|R.M. Ballantyne
I was here a little while ago and nobody answered my knock, though I could hear that typewriter going rat, tat, tat all the time.The Girls of Central High on the Stage|Gertrude W. Morrison
Rat this pawn of the Eye may have been, but even a cornered rat will fight with the courage of a lion.
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