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Let's begin with the letter A24/7
Definition: All the time; always available; without a break.
Example: 1)
In New York City, a lot of stores are open 24/7.
2)
I had to move because my neighbors played loud dance music 24/7.
Etymology: Some convenience stores are open 24 hours a day, 7 days a week. The phrase is used for anything that is always (or nearly always) available.
Synonyms: around the clock
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airhead
Definition: Someone who isn't very smart; a stupid person.
Example: 1)
Susan and Jim are such airheads -- they love sports but they are failing all of their classes at school!
2)
I woudn't ask Alaine for the answer -- she's an airhead!
Etymology: If your head is filled with air instead of brains, you probably can't think very well.
Synonyms: ditz
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all ears Definition: Listening carefully; keenly attentive.
Example: 1)
I was all ears as Svet told me this exciting story.
Etymology: You listen with your ears, so if you are 'all ears' your entire being is listening to someone speak
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all nighter Definition: A study or work session that goes through the night; studying without sleep ( usually a last-minute course of action ).
Example: 1
) We pulled an all-nighter to finish the report.
2)
I pulled an all-nighter to study for my math exam.
Etymology: The term is popular with college students who spend the night before an exam studying ( or ‘cramming’ ), trying to learn a lot of material in a short period of time. The term is frequently used in the phrase ‘ pull an all-nighter
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an arm and a leg Definition: A large amount of money; very expensive or costly.
Example: 1)
My new Mercedes cost me an arm and a leg!
Etymology: Some things are so expensive that they are painful to buy, and cost everything you have.
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ants in pants Definition: To be nervous or anxious or jumpy; to be unable to sit still.
Example: 1)
The children had ants in their pants, so we took them outside for some exercise.
2)
Would you please stop tapping your foot?! You must have ants in your pants!
Etymology: If you had 'ants' (small insects) in your 'pants' (clothing) you would probably feel like jumping around.
Synonyms: ftoom