flippant

She gave him a flippant answer.

If there is a flaw it is a lack of contact with the characters—the only figure portrayed with feeling is the flippant and omnisexual Hana Hanakova who becomes the real survivor of the story.

She made a flippant remark about the serious topic.

His flippant attitude towards the project upset his colleagues.

I don't appreciate your flippant attitude towards my concerns.

Her flippant response to the question showed her lack of seriousness.

He has a tendency to be flippant in serious situations.

The teacher scolded the student for his flippant behavior in class.

She couldn't stand his flippant jokes anymore.

The politician's flippant remarks offended many voters.

His flippant dismissal of the issue angered his colleagues.

The CEO's flippant attitude towards employee concerns created a toxic work environment.