knock someone off their perch

Verb

idiomatic

(idiomatic) To defeat or overcome someone who was in a dominant position.

Japanese Meaning

優位な立場にあった相手を打ち負かす / 支配的地位の人物を退ける / 最高の地位にあった人を打倒する

その思いがけない合併により、小さな競合企業は市場で長年の首位企業を打ち負かし、その地位から引きずり下ろした。

Sense（1）

(idiomatic) To defeat or overcome someone who was in a dominant position.

knocks someone off their perch

（ present singular third-person ）

knocking someone off their perch

（ participle present ）

knocked someone off their perch

（ participle past ）

knocked someone off their perch

（ past ）