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[bat-ee] /ˈbæt i/
adjective, battier, battiest. Slang.
insane; crazy; eccentric.
Origin of batty
bat2 + -y1
Related forms
battiness, noun Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for batty
  • The eccentric who is considered a genius rather than a batty recluse.
  • Can completely relate to being on the verge of going batty, for different reasons.
British Dictionary definitions for batty


adjective (slang) -tier, -tiest
insane; crazy
odd; eccentric
Word Origin
C20: from bat²; compare the phrase have bats in the belfry
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 batty

1580s, "pertaining to bats," from bat (n.2) + -y (2). Slang sense "nuts, crazy" is attested from 1903, from the expression (to have) bats in (one's) belfry, also meaning "not be right in the head" (1899).

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



Crazy; nuts: He was grinning like he was bats/ funnier than you'd expect, fairly batty ( first form 1920+, second form 1900+)

Related Terms

have bats in one's belfry


Related Terms


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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