ADJ-GRADED
轻率的;轻浮的;不严肃的
If you describe a person or what they say as flippant, you are criticizing them because you think they are not taking something as seriously as they should.
例句
Don't be flippant, damn it! This is serious!...
该死，不要不当回事！这是很严肃的！
He now dismisses that as a flippant comment.
他现在把那当作轻率的随口一说不再理会了。