1. a state of being irritable, grumpy, or displeased; a negative emotional disposition
He woke up in a bad mood and snapped at everyone.
Ele acordou de mau humor e foi mal-educado com todos.
2. a temporary state of unhappiness or dissatisfaction
She's been in a bad mood since she heard the news.
Ela está de mau humor desde que ouviu a notícia.