More idioms are :
1A. Call it a day
1B. Something is considered done and to stop working on it for now.
2A. Under the weather
2B. To get ill.
An idiom is a commonly used proverb or statement that has a metaphorical interpretation distinct from its literal meaning. When you say you're "under the weather," you don't necessarily mean that you're standing in the pouring rain, for instance. The term "under the weather" is used to describe someone who is ill or feeling under the weather.
Even if the cultural experience being summarized or reflected by the idiom is no longer relevant or up to date, it is typical for idioms to do so. For instance, when someone must perform an unfavorable action, you can advise them to "bite the bullet." In order to stop screaming during a combat operation, injured troops would literally bite down on a bullet.
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