Item used in some juvenile pranks

• Prankster's detonation
• High school prank component, maybe
• Object used in some pranks
• Device containing sulphurous matter traditionally loved by naughty boys
• Protester's tool, maybe
• Prankster's smelly explosive
• Smelly prank

Wiktionary Word definitions in Wiktionary
n. 1 An explosion of unpleasant odors, like rotten eggs, garbage, or other unpleasant odors. 2 A device that produces such burst of unpleasant odors.