on the brain
phrase
informal
: always in one's thoughts
I've had pizza on the brain all day.
He's got sex on the brain.
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Doing both puts a lot of stress on the brain when temperatures rise, and some people are incredibly sensitive to it.
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Mark Prussin,
CBS News,
29 June 2026
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Mark Prussin,
CBS News,
29 June 2026
See All Example Sentences for on the brain
Cite this Entry
“On the brain.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/on%20the%20brain. Accessed 1 Jul. 2026.
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