be chalk and cheese

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be chalk and cheese

To be very different from one another. Good luck getting those two to talk to each other—they're like chalk and cheese. My daughters are chalk and cheese these days—one loves baseball and the other loves ballet.
See also: and, chalk, cheese

be (like) chalk and cheese

  (British & Australian) also be as different as chalk and cheese (British & Australian)
if two people are like chalk and cheese, they are completely different from each other I don't have anything in common with my brother. We're like chalk and cheese.
See put down to experience
See also: and, chalk, cheese