2. Can also be used to refer to a person, but is similar to calling someone a "butt" or idiot in American English(not a particularly bad curse word, but is derogatory).
2. The guy at the drive thru was a zhopa...he forgot my fries.
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: *uses loudspeaker* *ZHOPA*
Boris wins the game.