off the deep end

English

Pronunciation

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Adjective

off the deep end

1. (usually in the phrase 'go off the deep end') Extremely angry.

   I told him that I'd broken the vase, and he went off the deep end.

2. (idiomatic, US) Crazy, erratic, or irrational.

   It used to be a funny comic, but lately it has gone off the deep end.

   Synonyms: see Thesaurus:insane

See also

• off the wall