cross the line

Verb

cross the line (third-person singular simple present crosses the line, present participle crossing the line, simple past and past participle crossed the line)

1. (idiomatic) To overstep a boundary, rule, or limit; to go too far or do something unacceptable.
   • I can tolerate a lot, but they really crossed the line when they broke the equipment.
   • I don't even know her
     But I feel a responsibility to do what's upstanding and right
     It's kinda like a code, yeah
     And you've been getting closer and closer, and crossing so many lines2012, Taylor Swift, “Girl at Home”, in Red, performed by Taylor Swift

   Synonyms:

   go too far, overstep the mark

2. To finish a race.

   Synonyms:

   go all the way

   Antonyms:

   fall at the last hurdle

3. To achieve completion of something.

   Synonyms:

   go all the way

   Antonyms:

   fall at the last hurdle

4. To cross the equator, as a vessel at sea.
5. To film from the opposite side of an imaginary axis on set in order to view the actors from the opposite direction.