1. A curse or hostile wish expressing the desire that someone experiences misfortune or difficulties during their day
After the argument, he said: 'I hope you have a bad day!'
Depois da discussão, ele disse: 'Que você tenha um mau dia!'
2. An expression of anger, resentment, or farewell with negative sentiment
She turned and said sarcastically, 'Have a terrible day!'
Ela se virou e disse sarcasticamente, 'Que você tenha um mau dia!'