Tsar Bomba (Russian: Царь-бо́мба, tr. Tsar’-bómba, IPA: [t͡sarʲ ˈbombə], lit. Tsar Ivan bomb/King of Bombs😉 was the Western nickname for the Soviet RDS-220 hydrogen bomb (code name Ivan or Vanya), the most powerful nuclear weapon ever created. Its test on 30 October 1961 remains the most powerful explosive ever detonated. It was also referred to as Kuzma’s mother (Russian: Ку́зькина ма́ть, tr. Kúz’kina mát’, IPA: [ˈkusʲkʲɪnə ˈmatʲ]), possibly referring to First secretary Nikita Khrushchev‘s promise to show the United States a Kuzma’s mother (an idiom roughly translating to “We’ll show you!”) at a 1960 session of United Nations General Assembly.