From Wiktionary, the free dictionary
From the use of clay-molded sugar in their preparation.
sugar skull (plural sugar skulls)
- (Mexico) A brightly colored skull face icon, placed on the grave of the deceased to celebrate their life during festivals and feast days.
- Synonym: calavera
- A more modern design of the same style, often done as a tattoo, and normally darker in colour and more macabre.