showing that you do not take something as seriously as other people think you should 轻率的 a flippant answer/attitude 轻率的回答;轻浮的态度 Sorry, I didn't mean to sound flippant. 对不起,我并不是故意油嘴滑舌的。 You can’t afford to be flippant about such matters. 在这种事情上,你不能轻率。
Oxford Collocations DictionaryFlippant is used with these nouns:- remark
Word Originearly 17th cent.: from flip + -ant, perhaps on the pattern of heraldic terms such as couchant and rampant. Early senses included ‘nimble’ and ‘talkative’, hence ‘playful’, giving rise to the current use ‘lacking seriousness’.