marcher sur les plates-bandes

IPA(Pronunciation)

figuratively

（比喩的に）誰かの足を踏む、誰かの縄張りに侵入する

English Meaning

(figuratively) to step on someone's toes, to encroach on somebody's turf

会議の際、クレールは同僚の縄張りに踏み込むのを避けるため、個別で話し合うことにしました。

During the meeting, Claire chose to speak privately to avoid stepping on someone's toes with her colleagues.