Don’t judge a book by its cover

An adage that means one can never rely on appearances alone, which appears to be of American origin from the late 1920s and rapidly gained acceptance...

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Don’t keep a dog and bark yourself

There is no point in employing someone if you end up doing his or her work. The earliest citation for this adage is c. 1583.

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Don’t know from a bar of soap

see Know from a bar of soap

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Don’t know squat

see Squat

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Don’t look a gift horse in the mouth

see Gift horse

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Don’t look at me in that tone of voice

Most sources attribute this expression to Punch Magazine in 1884. The exact words were, 'Don’t look at me, sir, with - ah - in that tone of voice', bu...

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Don't move a muscle

see Move a muscle

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Don’t put all your eggs in one basket

see Eggs in one basket

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Don’t suffer fools gladly

see Suffer fools gladly

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Don’t teach an old dog new tricks

see Teach old dog new tricks

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Don’t teach your grandmother to suck eggs

see Teach your grandmother to suck eggs

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Don’t throw the baby out with the bathwater

see Throw the baby out with the bathwater

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Doolally (tap)

Doolally is British slang from the old colonial days that is still heard from time to time but seldom used in print these days. It means touched, ecce...

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Doom and gloom

Doom and gloom is a rhyming couple that describes feelings of despondency or the forecast of bad tidings, especially in a financial or political conte...

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Door closes/shuts, another one opens

see When one door closes/shuts, another door opens

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