firecracker
n.β Β«With their affection for euphemism, Americans call them “firecrackers” or “popcorn”. They are hollow shells, containing anything from three to more than 2000 bomblets that can spread over large areas and lie dormant for decades.Β» ββUse of cluster bombs” The Herald (Glasgow, Scotland) Feb. 23, 2007. (source: Double-Tongued Dictionary)