Loony left
The loony left is a pejorative term used to describe those considered to be politically hard left. First recorded as used in 1977, the term was widely used in the United Kingdom in the campaign for the 1987 general election and subsequently both by the Conservative Party and by British newspapers that supported the party, as well as by more moderate factions within the Labour movement to refer to the activities of more militantly left-wing politicians that they believed moderate voters would perceive as extreme or unreasonable.