Meaning

1 senses
  1. (Australia, New Zealand, UK, derogatory)Left-wing politicians or activists whose policies or ideas are considered to be ridiculous or too politically correct.

    1988: John Twitchin, Introduction to The Black and White Media Book The term ‘anti-racist' has become associated with ‘left-wing sentimentality', not to say ‘loony left extremism'.

Forms

plural: loony lefts
Singularloony left
Pluralloony lefts

regular

See also

neighbours in the dictionary
loony left — meaning, examples, forms, synonyms | Krumeto