A controversial all-Queensland, all-white episode of ABC's Q&A descended into a shouting match on Monday night as panellists, including Pauline Hanson and Bob Katter, noisily debated issues ranging from climate change to the White Australia policy - with Ms Hanson admitting she didn’t know what the term "final solution" meant when a Katter MP used it in Parliament.

In a throwback to the origins of Hansonism, the phrase "please explain" - Ms Hanson’s famous 1997 answer when asked if she was "xenophobic" - was used twice during the show.

Bob Katter. Credit:ABC

It first arose in a question from a Muslim audience member to Mr Katter, an independent MP, about the recent speech by his party senator Fraser Anning in which Senator Anning used the term "final solution".

In his controversial speech, Anning said "the final solution to the immigration problem is a popular vote", later denying that he purposefully invoked the term used by the Nazi regime to describe a genocidal policy of exterminating Jewish people.