cross the line

cross the line

if someone crosses the line they start behaving in a way that is not socially acceptable. Players had crossed the line by attacking fans on the pitch.

See also: cross, line

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cross the line

1. to change from being acceptable to being unacceptable. I thought the jokes crossed the line and were basically embarrassing.

2. to do something wrong. If you steal someone's idea, you have absolutely crossed the line.

See also: cross, line