adj.轻薄的,轻浮的,无礼的,油头滑脑,轻口薄舌
Don't be flippant, damn it! This is serious!
该死,不要不当回事!这是很严肃的!
It was a flippant and unfeeling remark.
这番话既轻率又无情。
I didn't mean any offence. It was a flippant, off-the-cuff remark.
我本无意冒犯,那不过是句脱口而出的冒失话。