Other forms: backbenchers
A backbencher is an elected member holding no senior post. A Labour backbencher, backbench opinion, a rebellious backbencher.
The name is literal: in the Commons, ministers and shadow ministers sit on the front benches and everybody else behind them. Backbenchers are freer to say what they think, since they have no position to lose, which makes them the ones worth listening to.
1nounbackbencherAn elected member holding no senior post.
“A little-known backbencher asked the Prime Minister an awkward question about hospital waiting lists.”
backbencher is a politician.
From backbench + -er.
Etymology from Wiktionary, CC BY-SA