1. A night characterized by difficulty sleeping, nightmares, insomnia, or other unpleasant experiences during sleep or nighttime hours
I had a bad night and woke up exhausted.
Tive uma má noite e acordei exausto.
2. An evening or night spent in an unpleasant or unfortunate way, such as at a poor social event or experiencing distressing circumstances
It was a bad night at the restaurant—the service was terrible.
Foi uma má noite no restaurante—o atendimento foi péssimo.