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.

Examples of on the brain in a Sentence

Recent Examples on the Web

Researchers plan to test whether shorter, occasional naps have different effects on the brain over time compared with longer, more frequent ones. — Scott Lafee, San Diego Union-Tribune, 21 July 2026

Native to the Pacific Islands, its active compounds (kavalactones) act directly on the brain's GABA receptors much like a mild sedative and are typically used for acute anxiety or insomnia. — Jesse Pines, Forbes.com, 4 July 2026

Doing both puts a lot of stress on the brain when temperatures rise, and some people are incredibly sensitive to it. — Mark Prussin, CBS News, 29 June 2026

Does anyone else have the late Val Kilmer on the brain? — Brittany Allen, Literary Hub, 10 Apr. 2026

Rhymes for on the brain

• aeroplane
• appertain
• ascertain
• capitaine
• cassegrain
• cellophane
• chatelaine
• counterpane
• entertain
• halothane
• hurricane
• hyperplane