chalk and cheese

(like) ˌchalk and ˈcheese

(also as different as ˌchalk and ˈcheese) (British English, informal) very different: It’s hard to imagine that Mark and John are brothers — they’re like chalk and cheese.
See also: and, chalk, cheese

chalk and cheese

Two objects that although appearing to be similar are in fact different. Just as certain varieties of crumbly white cheese might at first glance resemble chalk, so for example, siblings who resemble each other might have completely different personalities. They would be said to be as different as chalk and cheese.
See also: and, chalk, cheese
References in periodicals archive ?
Chalk and cheese that are trapped together in a metal box twice a day in traffic.
WE LOVE COMEDY
However, a loophole allows the chalk and cheese pair to re-enter the competitive world, the caveat being that they become the first malemale team.
FILMCHOICE
Chalk and cheese plans THE Grimscar Valley and St Luke's developments at Crosland Moor are as different as chalk and cheese.
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I think we get on so well because we're like chalk and cheese.
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Like a moodier Sideways, its many small pleasures derive from the interactions between its chalk and cheese leads.
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According to Border's article in the Daily Telegraph, he opined that the standard of bowling Warner will face in Africa and the conditions he would experience will be chalk and cheese to the challenges that await him in England.
Border blasts 'brainless' decision to send Warner to Africa for match practice
Leeds' kicking game was chalk and cheese compared to ours.
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Glyndwe r University's Professor Michael Scott said: "We've tried collaboration with traditional universities - it was chalk and cheese.
...NEWSFILE..
CHALK AND CHEESE Paul Rust as Denis Cooverman and Hayden Panettiere as Beth Cooper.
COMEDY
The moon is made of green cheese -- Like chalk and cheese -- Dude, what's with the cheesy grin?
Uno Chicago Grill(R) Says Cheesiness is Great (or is it Grate?)
Cheese and biscuits, port and Stilton, chalk and cheese.
Quality, value and relevance are key
Trainer Len Lungo said: "They are like chalk and cheese.
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Amanda Donohoe and Kris Marshall are the chalk and cheese detectives taking on London's underworld.
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Meanwhile Val plans to dump Ian after finally realising they're like chalk and cheese.
SOAPS
We were disappointed last week but the performances are like chalk and cheese.
Bro way decision was vital
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