破は顔がん大たい笑しょう

noun, noun or participle which takes 'suru'

burst out laughing; break into a hearty laugh

A yojijukugo describing a sudden, broad, and cheerful laugh, often used in literary or formal contexts. Can be used as a noun or with する.

• 彼かれの冗じょう談だんに、会かい場じょうは破は顔がん大たい笑しょうした。

  At his joke, the audience burst into hearty laughter.

• その話はなしを聞きいて、思おもわず破は顔がん大たい笑しょうしてしまった。

  Hearing that story, I couldn't help but break into a big laugh.