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Loony
Informal
Offensive
What is the origin of the term "loony" and how is it used?
Loony is a slang term that appeared in English in the late 19th–early 20th century as a label for a person considered crazy, mentally unstable, or foolish. The term comes from "lunatic," which itself derives from the Latin luna (moon), reflecting the old belief that the moon could affect mental health. Historically, it was derogatory, used to insult or mock someone's mental state or behavior. Today it remains informal and mildly offensive, often used in casual, joking, or critical contexts rather than in polite or clinical language.
Examples
He 's a complete loony for trying to ride his bike down that steep hill.
loony
01
crazy or behaving in a foolish or irrational way
Informal
Offensive
Examples
She came up with a loony idea to build a roller coaster in her backyard.
