backbencher
Concise Oxford English Dictionary © 2008 Oxford University Press:
backbencher/bakˈbentʃə(r)/
▶noun (in the UK) an MP who does not hold office in the government or opposition and who sits behind the front benches in the House of Commons.
– derivatives
backbench adjective.
backbench adjective.
'backbencher' also found in these Oxford entries:

