In Spanish slang, 'petaca' often refers to a small bottle of alcohol, typically a flask. It can also refer to a person's backside in a somewhat vulgar or playful manner.
Examples
- Spanish: 1. No olvides tu petaca para la fiesta esta noche. 2. Ella tiene una petaca muy grande.
- English: 1. Don't forget your flask for the party tonight. 2. She has a very big backside.