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loony1

[loo-nee] /ˈlu ni/
adjective, loonier, looniest.
1.
lunatic; insane.
2.
extremely or senselessly foolish.
noun, plural loonies.
3.
a lunatic.
Also, looney, luny.
Origin
1860-1865
1860-65; lun(atic) + -y2
Related forms
looniness, noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for looniness

loony

/ˈluːnɪ/
adjective loonier, looniest, lunier, luniest
1.
lunatic; insane
2.
foolish or ridiculous
noun (pl) loonies, looneys, lunies
3.
a foolish or insane person
Derived Forms
looniness, luniness, noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for looniness

loony

adj.

also loonie, looney, 1853, American English, short for lunatic, but also influenced by loon (n.2) and perhaps loon (n.1), the bird being noted for its wild cry and method of escaping from danger. As a noun by 1884, from the adjective. Slang loony bin "insane asylum" is from 1919. Looney left in reference to holders of political views felt to be left-wing in the extreme is from 1977. Looney Tunes, Warner Bros. studios' animated cartoon series, dates from 1930.

Online Etymology Dictionary, © 2010 Douglas Harper
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Slang definitions & phrases for looniness

loony

adjective

Crazy; nutty: You looney punk/ ''I think, sir, he's a little luny,'' replied Ginger Nut, with a grin (1853+)

noun

(also loon or loonball): the inspired looney who hated killing/ would have shown up in a Mel Brooks epic had that loonball thought of it first (1884+)

[probably fr both lunatic and crazy as a loon (found by 1845)]


The Dictionary of American Slang, Fourth Edition by Barbara Ann Kipfer, PhD. and Robert L. Chapman, Ph.D.
Copyright (C) 2007 by HarperCollins Publishers.
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