軽けい佻ちょう

na-adjective, noun

flippant; frivolous; thoughtless

Describes speech, attitude, or behavior that is shallow, lacking seriousness, or inappropriately light-hearted. Often used in formal or written contexts.

• 彼かれの軽けい佻ちょうな発はつ言げんが会かい議ぎの雰ふん囲い気きを悪わるくした。

  His flippant remark soured the atmosphere of the meeting.

• 軽けい佻ちょうな態たい度どは社しゃ会かい人じんとしてふさわしくない。

  A frivolous attitude is not appropriate for a working adult.