| Idiom | Meaning | Example |
| dude |
a man who dresses like a cowboy or rancher to impress people,
any guy who dresses and acts cool, drugstore cowboy
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Hey dude! Got your party clothes on? You look real pretty!
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| due north |
straight north, directly north
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Follow the winding road west to the junction; then go due north.
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| duh |
how stupid, do you know anything? go figure,
ignorance is bliss
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I didn't know how to spell comeuppance. Duh!
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| duke it out |
fight with your fists, punch each other
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Gerry wanted to duke it out with the referee - tried to punch him.
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| duke's mixture |
(See a duke's mixture
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| dumb as a sack of hammers |
(See as dumb as a sack of hammers)
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| dumbbell |
one who does not think, an airhead, knucklehead
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What a dumbbell I am! I locked the keys in the car.
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| dumbo |
a person who acts stupid, a fool, a dipstick
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Hey, dumbo! You're driving on the wrong side of the road!
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| dump her/him |
leave her or him, drop her, tube her (see tube him)
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Sid and Marie had a fight, so he dumped her and began seeing me.
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| dump on |
unload the dirty jobs, give what is left over
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They dump on Karen too much. They give her the large classes.
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