grumbletonian UK /ˌɡɹʌm.bəlˈtəʊ.ni.ən/US /ˌɡɹʌm.bəlˈtoʊ.ni.ən/ noun1 •(disapproving, no longer used) Originally a member of the 17th-century Country Party; later a member of the opposition. formsgrumbletonians
