I was chatting with someone today and the person wrote this sentence, but I don't get the meaning of it under the context.

A: I will be a little late today. My car does not start.

B: You’ve got cars on the brain.

What is B saying in this context??

closed as off-topic by FumbleFingers, ab2, Mari-Lou A, Andrew Leach Jan 25 '16 at 23:16

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    have something on the brain - (informal) to not be able to stop thinking or talking about one particular thing. As it happens, their example usage is You've got cars on the brain. Can't we talk about something else for a change? – FumbleFingers Jan 25 '16 at 20:32

Have on the brain

It means being unable to stop thinking or talking about one particular thing.

From your example, I just think that B is having a play on words and nothing more.

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    Hello, NVZ. The question is general reference, as FF indicates by answering in a 'comment'. – Edwin Ashworth Jan 25 '16 at 21:17
  • Hi, NVZ. I admire your enthusiasm and willingness to help English learners. But as Edwin mentioned, this question is easily answerable by Googling the phrase. Just a heads-up. (1) See if the question is too easy. (2) See if the question received any downvote (It received two). (3) See if the question might be better suited at our sister site,English Language Learners. Those questions are off-topic and we are discouraging answering those questions. You will learn more as time goes by. And try to understand what kind of question is being closed and why. Good luck – user140086 Jan 26 '16 at 7:19
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    @Rathony Agreed. Thank you. :) IMD, there wasn't a comment, nor downvote when I answered it. – NVZ Jan 26 '16 at 7:21

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