Definition of bats in English:

bats

Syllabification: bats
Pronunciation: /bats
 
/

adjective

[predic.] informal dated
  • (Of a person) crazy; insane.
    More example sentences
    • I think the kid and I knew she was bats but she was a hoot to be with.
    • She was bats and contrary, but she seemed to be self-aware and have a genuine sense of humour about her own battiness and contrariness.
    • Either that, or she was bats.

Origin

early 20th century: from the phrase have bats in the belfry (see bat2).

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