on the brain

idiom

informal
: always in one's thoughts
I've had pizza on the brain all day.
He's got sex on the brain.

Examples of on the brain in a Sentence

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Meanwhile, Tommy also has oil on the brain, negotiating the fine print of a high-stakes loan with cartel boss Gallino (Andy Garcia), the financial backer behind the offshore project. Samantha Stutsman, PEOPLE, 21 Dec. 2025 That means Gen Z has bigger screens, bigger sound systems, and more snacks on the brain. Ryan Lattanzio, IndieWire, 17 Dec. 2025 Others have been seriously injured, ranging from fractured skulls to bleeds on the brain, while one player at Walsall in League Two suffered concussions and seizures in an incident last season. Daniel Taylor, New York Times, 17 Dec. 2025 The increase is due to caffeine's effect on the brain, which triggers a chain of events that causes blood vessels to narrow and systolic and diastolic pressure to rise for up to four hours or more. Md Published, Verywell Health, 8 Dec. 2025 See All Example Sentences for on the brain

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“On the brain.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/on%20the%20brain. Accessed 8 Jan. 2026.

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