flippant

1. ADJ 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. 輕率的[表不滿]

Don't be flippant, damn it! This is serious!

該死，不要不儅廻事！這是很嚴肅的！

He now dismisses that as a flippant comment. 他現在把那儅作一個輕率的評論，不再理會了。