bats

American  

[bats] / bæts /

adjective

Slang.

1. insane; crazy.

   He's gone bats.

---

bats British  

/ bæts /

adjective

1. informal crazy; very eccentric

---

Etymology

Origin of bats

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

Example Sentences

Concerns have been raised over the cost of two houses being built for bats next to junction 10 of the M5.

From BBC

And she has one of the best laugh lines in the movie when she bats her eyes at the baddies and tries to placate them with, “You guys seem like good people.”

From Los Angeles Times

With the USA bats continuing to flail against Rodriguez, the Venezuelans doubled their lead in the top of the fifth inning.

From Barron's

That was supposed to be the U.S.—until more than a billion dollars’ worth of bats went oddly quiet.

From The Wall Street Journal

However, if the U.S. bats do not rouse from their slumber, the championship game will be a game the Americans curse forever.

From Los Angeles Times