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English definition of “have sth on the brain”

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have sth on the brain

informal disapproving
to not be able to stop thinking or talking about one particular thing: You've got cars on the brain. Can't we talk about something else for a change?
Translations of “have sth on the brain”
in Chinese (Traditional) 念念不忘, 總是想到(或提到)…
in Chinese (Simplified) 念念不忘, 总是想到(或提到)…
(Definition of have sth on the brain from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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