Italian: slang for "dead head".
A large (large i.e., one to forty pounds) sack of flash powder typically suspended from a gallows-type frame at head height. Exploded to create a deafening blast and concussion. Rarely seen in the US outside of pyrotechnic conventions such as the PGI convention. More common in Italy, Mexico and Spain's Mascaletta's(countries typically a little more liberal with firework laws), they are typically fired after the finale.