Facetious – Being flippant, superficial or frivolous about a serious subject in an attempt to appear funny or clever

(Pronounced fuh-see-shuhs)

To remember the definition of the word facetious, use the following mnemonic:

His face features were not serious (facetious) and this was not a good time to be amusing about a serious matter just to be funny.

Examples of facetious in a sentence

The facetious man kept joking as if the crime he committed was all fun and games.

Mary thinks she's being funny, but she's only being facetious and rude.

The teacher tried to help the struggling student, but their classmates were being facetious.