off one's trolley

idiomatic phrase

British, informal

: mentally unsound

Julian Cope is, as the English say, barking mad. Off his trolley. Utterly daft.—

David Fricke

Word History

First Known Use

1892, in the meaning defined above

Time Traveler

The first known use of off one's trolley was in 1892

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Style

“Off one's trolley.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/off%20one%27s%20trolley. Accessed 3 Nov. 2025.

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off one's trolley

idiomatic phrase

Word History

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