1. not showing proper respect or seriousness; treating something important in a lighthearted or dismissive manner
His flippant remarks about the tragedy were inappropriate and hurtful.
Seus comentários irreverentes sobre a tragédia foram inadequados e prejudiciais.
2. characterized by a casual, disrespectful, or impertinent tone
She gave a flippant answer to a serious question.
Ela deu uma resposta desdenhosa a uma pergunta séria.