backbencherEnglishOxford New American Dictionarybackbencher /ˈbakˌben(t)SHər, ˈbækˌbɛn(t)ʃər/ ▸ noun (in the UK) a Member of Parliament who does not hold office in the government or opposition and who sits behind the front benches in the House of Commons: he was cheered by Tory backbenchers.