flippancy ['flɪpənsɪ]

以下由轻松背单词网站提供

n.轻率；浮躁；无礼的行动

inappropriate levity

His flippancy makes it difficult to have a decent conversation with him. 他玩世不恭，很难正经地和他交谈。
The flippancy of your answer peeved me. 你轻率的回答令我懊恼。