have (someone or something) on (one's) mind
To be thinking about someone or something, perhaps to the point of preoccupation. I've had Jennie on my mind lately—do you know how she is? You look worried—do you have something on your mind?
have someone or something on one's mind
and have someone or something on the brain (More informal with brain.) to think often about someone or something; to be obsessed with someone or something. Bill has chocolate on his mind. John has Mary on his mind every minute. Karen has Ken on the brain.
have something on your mind
be troubled by the thought of something.have something on your ˈmind
, something is on your ˈmind
be worried about something; be thinking a lot about a problem, etc: His daughter’s very ill, so he’s got a lot on his mind just now.She asked me if there was anything on my mind.