Calavera

The word calavera, Spanish for "skull", can refer to a number of cultural phenomena associated with the Mexican celebration of the Day of the Dead.
calaveras de azúcar ("sugar skulls") are used to adorn altars and can be eaten.
calaveras are poems, written for the Day of the Dead but intended to humorously criticize the living.
calavera can refer to any artistic representations of skulls, such as the lithographs of José Guadalupe Posada.