backbencher

[ bak-ben-cher, -ben- ]
/ ˈbækˈbɛn tʃər, -ˌbɛn- /

noun

any of the members of a legislature, especially of the House of Commons of Great Britain, but not including the leaders of the parties.

Origin of backbencher

First recorded in 1905–10; back bench + -er1

British Dictionary definitions for backbencher

backbencher
/ (ˈbækˈbɛntʃə) /

noun

British, Australian and NZ a Member of Parliament who does not hold office in the government or opposition