Definition of Moaning Minnie in English:

Moaning Minnie

Pronunciation /ˌməʊnɪŋ ˈmɪni/

noun

British
  • 1informal A siren or klaxon, especially (now historical) an air-raid siren.

  • 2military slang A kind of mortar or rocket launcher used by German forces in the Second World War (1939–45); especially = nebelwerfer .

  • 3informal A moaner, a complainer; a pessimist.

Origin

1940s. From moaning + Minnie, female forename, in sense 2 punningly after Minnie.