| Idiom | Meaning | Example |
| don't know which end is up |
are confused, are mixed up
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After talking to four bureaucrats, I didn't know which end was up.
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| don't know which side your bread is buttered on |
do not know what is really important, have not learned much about life
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If you refuse the assistance, you don't know which side your bread is buttered on.
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| don't know your ass from a hole in the ground [B] |
you are ignorant, you are mistaken, mixed up
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He said one member of the cult was so confused he didn't know his ass from a hole in the ground.
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| don't look a gift horse in the mouth |
do not be critical of a gift; be grateful for a gift
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Don't evaluate a gift. Don't look a gift horse in the mouth.
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| don't make a mountain out of a molehill |
do not cause a big fuss about a small problem
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So I scratched the car. Don't make a mountain out of a molehill.
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| don't make me laugh |
do not be ridiculous, don't give me that line
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When I said I wrote the novel, he said, "Don't make me laugh."
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| don't make no nevermind |
(See it don't make no nevermind)
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| don't make waves |
do not do anything that will cause problems
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Our company has changed a lot. Don't make any more waves.
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| don't mention it |
it was no trouble, no problem
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"Thanks for the ride," I said. "Don't mention it," he replied.
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| don't push your luck |
do not try to get too much, do not ask for more
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If Mom says maybe, don't push your luck. Be patient.
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