From Longman Dictionary of Contemporary Englishhand grenadeˈhand greˌnade noun [countable] PMWa small bomb that you throw
Examples from the Corpus
hand grenade• Two days earlier, Myeni had escaped unhurt after a hand grenade was thrown into his house in Soweto.• A: I meant just-I meant only that the only means I could evacuate the people would be a hand grenade.• Janko Janjic, 43, detonated a hand grenade that killed him and injured the soldiers.• Alcohol is more like a pharmacological hand grenade. 