have something on the braininformalTHINK ABOUT to be always thinking about something 一直想着某事物，牵挂着某事物 I’ve got that song on the brain today. 今天我脑子里一直想着那首歌。
have something on the brain• You always have food on the brain.• But the festering problem may have effects on the brain, just as it can elsewhere in the body.• Must have maggots on the brain.• It's unbelievable - you have sex on the brain 24 hours a day!
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