Flippant – treat serious things lightly
She flipped an ant (flippant) onto a light (lightly) when she really should have been teaching them a serious science lesson.
Words with a similar meaning to flippant include frivolous, superficial and shallow.
Examples of flippant in a sentence
His flippant response earned him an angry glance from his manager.
This is a serious occasion so please don't be flippant.
The student's flippant attitude during the lecture led to his suspension from the college.