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rats

British  
/ ræts /

interjection

  1. an exclamation of rejection or disdain

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

adjective

  1. slang deranged; insane

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

To overcome these challenges, researchers at the Centre for Genomic Regulation and the University of California San Diego turned to rats.

From Science Daily

When everything from the rats to the Christmas tree get bigger, so does Clara as she goes from a young girl to an adolescent.

From Los Angeles Times

The team measured the stress hormone corticosterone in the rats, which is the rodent equivalent of the human stress hormone cortisol.

From Science Daily

She explained that rats were chosen for the behavioral portion of the research because they typically perform more consistently than mice on longer and more complex tasks.

From Science Daily

No character in film this year has sparked more conversation than Perfidia, who rats out members of the French 75 to avoid prison and abandons her daughter in the haze of postpartum depression.

From Los Angeles Times