In Spanish slang, 'calavera' is often used to describe a person who is playful, mischievous or likes to live life on the edge. It literally translates to 'skull', but it's not used in a morbid context in slang.
Examples
- Spanish: Mi primo es una calavera, siempre está buscando la próxima aventura.
- English: My cousin is a calavera, he's always looking for the next adventure.