Noun. A lethal substance with a smexy hairdo and neat mustache. 1 small dose enough to kill 6.000.000 people. Only works with jews. But still 1/5 as lethal as Stalinium.
Jew: Hey i dont like nazis
Guy with bottle of hitlerium: *shows bottle with hitlerium* U wot m8
Jew (now scared): Oh shit hes got hitlerium