失しっ笑しょう

noun, noun or participle which takes 'suru', intransitive verb

involuntary laughter; laughing despite oneself

Laughing when one should not, or being unable to suppress laughter. Often used in situations where laughter is socially inappropriate.

• 厳げん粛しゅくな式しき典てんで失しっ笑しょうしてしまった。

  I burst out laughing at the solemn ceremony.

• 彼かれの真面目まじめな顔かおを見みて、思おもわず失しっ笑しょうした。

  Seeing his serious face, I couldn't help but laugh.

noun, noun or participle which takes 'suru', intransitive verb

scornful laughter; snicker

Colloquial use for laughing at someone or something with contempt or ridicule. Less common than the involuntary-laughter sense.

• 彼かれの失しっ敗ぱい話ばなしに、皆みなが失しっ笑しょうした。

  Everyone snickered at his story of failure.