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to look out for number one
01
to not care about other people and do what one believes is best for oneself
![to [look] out for number one definition and meaning](https://cdn.langeek.co/photo/42492/original/?type=jpeg "to [look] out for number one definition and meaning")
What is the origin of the idiom "look out for number one" and when to use it?
The idiom "look out for number one" advises a person to prioritize their own interests and well-being above all else. It originated in the mid-20th century and is often used in a somewhat self-centered or survivalist context. This expression is used to emphasize the importance of self-preservation and the idea that one should take care of their own needs and concerns first, especially in competitive or challenging situations.
例子
When it comes to personal finances, it's essential to look out for number one and save for your future.
In a crisis, it's human nature to look out for number one, ensuring personal safety before helping others.
In a fiercely competitive job market, you often have to look out for number one to secure the best opportunities.
He decided to look out for number one and negotiate a better salary for himself.
