step out of line

US /stɛp aʊt əv laɪn/
UK /stɛp aʊt əv laɪn/
"step out of line" picture
1.

dépasser les bornes, sortir du rang

to behave badly or break the rules

:
If you step out of line, you'll be punished.
Si tu dépasses les bornes, tu seras puni.
The teacher warned the students not to step out of line during the field trip.
Le professeur a averti les élèves de ne pas dépasser les bornes pendant la sortie scolaire.