喧嘩腰

えらくご機嫌ななめね、けんか腰にならないで。

Wow, you're really in a bad mood. Don't get scrappy.

共通の利害をもった両(りょう)当事者がけんか腰でいたとき、彼(かれ)が間(あいだ)に入(はいる)って、いさかいにけりをつけた。

Two different parties with common interests were on the warpath when he cut in to settle the dispute.