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to cross the line
01
to show a behavior that is unacceptable or improper
![to [cross] (the|a) line definition and meaning](https://cdn.langeek.co/photo/43943/original/?type=jpeg "to [cross] (the|a) line definition and meaning")
What is the origin of the idiom "cross the line" and when to use it?
The idiom "cross the line" likely emerged from the concept of drawing lines or boundaries to establish acceptable behavior or standards. By crossing the line, someone is symbolically stepping over that boundary, often into territory that is considered unacceptable, offensive, or morally objectionable. It is often used to describe situations where someone's actions, words, or behavior overstep what is considered acceptable, appropriate, or morally right.
例
His naughty jokes were always entertaining, though they sometimes crossed the line.
The comedian often crosses the line with their controversial jokes, causing outrage among certain audiences.
The instant replay clearly showed the ball crossing the line, prompting the referee to give the goal.
He crossed the line when he betrayed his friend's trust by sharing confidential information.
The comedian's jokes crossed the line, and many in the audience took exception.
