loon
In real, traceable use. Part of the curated seed collection; community review is coming.
Meaning · English
A crazy or deranged person; a lunatic.
Register: slang
Where it’s used:
Used
American English
Examples
An electric fire came next, followed by an umbrella and then a colander. "This bowl will carry no water," he muttered. "Some loon hath pierced it with holes."
Usage example from English Wiktionary (CC BY-SA 4.0, retrieved 2026-07-30)
Sources & notes
Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-07-30 via kaikki.org).
Common questions
What does “loon” mean?
A crazy or deranged person; a lunatic.
Is “loon” formal or informal?
loon is generally slang.