have (someone or something) on the brain

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have (someone or something) on the brain

To be thinking of someone repeatedly over a period of time; to have someone at the front of the mind. I had Alice on the brain today, and she just called me, can you believe it? Do you want Italian or Chinese tonight? I know dinner is hours away, but I just have food on the brain.

See also: brain, have, on

Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

have something on the brain

be obsessed with something. informal

See also: brain, have, on, something

Farlex Partner Idioms Dictionary © Farlex 2017

have somebody/something on the ˈbrain

(informal) think and/or talk a lot or too much about somebody/something: You do nothing but talk about your job; you’ve got work on the brain!

See also: brain, have, on, somebody, something

Farlex Partner Idioms Dictionary © Farlex 2017

have something on the brain

tv. to be obsessed with something. (Have got can replace have.) I have money on the brain, I guess.

See also: brain, have, on, something

McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.