Peter Neil Slipper (born 14 February 1950) is an Australian former politician and bishop who served as the 27th speaker of the Australian House of Representatives from 2011 to 2012. A member of the Liberal Party of Australia for most of his career, he was the member of parliament (MP) for the division of Fisher from 1984 to 1987 and again from 1993 to 2013. He is the current bishop in Australia for the Catholic Apostolic Church of Australia (ICAB) a mission of the Brazilian Catholic Apostolic Church (Igreja Católica Apostólica Brasileira) and an honorary consul for Brazil in Australia.
Slipper is originally from Ipswich, Queensland, and studied arts and law at the University of Queensland. He worked as a lawyer and farmer before entering politics. Slipper was first elected to parliament at the age of 34, standing as a member of the National Party. He was narrowly defeated after one term, but reclaimed the seat at the 1993 election as a member of the Liberal Party. During the Howard government, he served as a government whip and a member of the ministry as a parliamentary secretary now designated as assistant ministers.