口こう角かく泡あわを飛とばす

expression, godan verb (-su)

argue heatedly; debate with foam at the mouth

Idiomatic expression describing a very passionate, often loud argument where the speaker is so worked up that spittle flies. Conveys intensity and emotional involvement.

• 彼かれらは政せい治じの話はなしになると、いつも口こう角かく泡あわを飛とばして議ぎ論ろんする。

  Whenever politics comes up, they always argue heatedly, foam flying from their mouths.

• 口こう角かく泡あわを飛とばすほどの熱ねつ弁べんに、聴ちょう衆しゅうは圧あっ倒とうされた。

  The audience was overwhelmed by the fervent speech, delivered with such passion that spittle flew.