口くち火びを切きる

expression, godan verb (-ru)

start a debate; get the ball rolling; fire the first shot; start a conversation

Idiomatic expression meaning to initiate a discussion, debate, or action; often used when someone takes the lead in a group setting.

• 彼かれが口くち火びを切きって、会かい議ぎが始はじまった。

  He started the debate and the meeting got underway.

• 誰だれかが口くち火びを切きらないと、話はなしが進すすまない。

  If someone doesn't get the ball rolling, the conversation won't move forward.