Bolocaust is a term used by Holocaust deniers which describes the allegedly fabricated nature of the Nazis' implementation of the final solution in which 6 million (mainy Jewish) peoples were liquidated. Bolocaust is a compound noun that combines the words 'bollocks' (meaning lies or bullshit) and Holocaust (meaning the destruction of the European Jews by the forces of Nazism).
Yad Vashem: So, Mr Irving, you allege that there was no plan to exterminate the Jews in Nazi occupied Europe and you go on to claim that the Holocaust never took place?
David Irving: That's right. It was a real Bolocaust.