facetious
adjectiveUK /fəˈsiːʃəs/
US /fəˈsiːʃəs/
Saying funny things about a serious topic in a way that is not meant to be taken seriously.
He made a facetious remark about the weather during the serious meeting.
OTHER MEANINGS
2. Not meant to be taken seriously or literally; said in jest.
Her facetious comment about quitting made everyone laugh.
3. Treating serious matters with inappropriate humor.
It was facetious to joke about the exam results.
4. Characterized by clever or playful humor.
The facetious tone of the article amused readers.