The idiom "have someone or something on the brain" originated from the concept of the brain being the center of thought and consciousness. It suggests being preoccupied or excessively preoccupied with a particular person or thing, to the point where it dominates one's thoughts and attention. The phrase is commonly used to highlight the persistent and intrusive nature of this preoccupation.

What is the origin of the idiom "have someone or something on the brain" and when to use it?

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to [have] {sb/sth} on the brain

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Definicja i znaczenie słowa „ have somebody or something on the brain” po angielsku

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