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Synonyms

bats

American  
[bats] / bæts /

adjective

Slang.
  1. insane; crazy.

    He's gone bats.


bats British  
/ bæts /

adjective

  1. informal crazy; very eccentric

"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

Etymology

Origin of bats

First recorded in 1915–20; see origin at bat 2, -s 3


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.

See Examples For:

One of the world's rarest bats could be at risk if ExxonMobil forges ahead with a Papua New Guinea gas project, a law firm working with impacted landowners warned Monday.

From Barron's ● Nov. 2, 2026

Scientists have discovered that European nightjars sacrifice flight efficiency for agility and use an unexpected wingbeat technique previously associated mainly with bats and insects.

From Science Daily ● Oct. 17, 2026

She bats her eyes at the camera as she says, “I’m not like you, Rebecca. I’m plain.”

From The Wall Street Journal ● Oct. 16, 2026

"It helps me escape reality for a bit, being scared about something that is tangibly scary, like monsters or bats," she added.

From BBC ● Oct. 12, 2026

Little remains of them but shuttered buildings colonized by bats and rodents and pigeons and spiders, while in the case of Whizbang there is nothing save stone ruins submerged in a sea of grass.

From "Killers of the Flower Moon" by David Grann

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