Simple Definition of loony bin

from our Learner's Dictionary

loony bin

noun

plural loony bins
informal + offensive : a hospital for people who are insane

Note: Loony bin is usually used in a joking way.

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“Loony bin.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/loony%20bin. Accessed 15 Apr. 2026.

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