cross the line

to have done something grievous.

Ron had clearly crossed the line with his jokes this time; he said one about the boss to the bossÕ wife.

News & Articles

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• Turn 4: NASCAR's burning questions
  Did Brad Keselowski cross the line? Is lower-level short-track racing safe? Should Dale Earnhardt Jr. be concerned? Is Chase Elliott ready for prime time? Our experts weigh in.
  June 19, 2013 - ESPN