bird egg
n.— «According to police reports, at about 10 am yesterday, police and a groundsman pulled out six boxes and several bags containing the firecrackers commonly known as “bird eggs” or “cherry bombs” from the school dumpster.» —“Cops seize 10,000 ‘cherry bombs'” by Sascha Mohammed Newsday (Trinidad and Tobago) Oct. 24, 2006. (source: Double-Tongued Dictionary)