The word zhopa means "ass" or "butt" in Russian and certain other Slavic languages.
Among other things, it is used in a game identical to the penis game, only in Russian: in a public institution, such as an educational institution or workplace, each player has to say "zhopa" and whoever says it the loudest wins.
Boris: Zhopa
Michael: Zhopa!
Vassily: ZHOPA!!!
Boris: *uses loudspeaker* *ZHOPA*
Boris wins the game.
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