ADJ-GRADED
(不分场合)乱开玩笑的,贫嘴的
If you say that someone is being facetious, you are criticizing them because they are making humorous remarks or saying things that they do not mean in a situation where they ought to be serious.
例句
The woman eyed him coldly. 'Don't be facetious,' she said.
妇人冷冷地看着他,说道:“别没正经了。”