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Mentally deranged; crazy.
[From bats in the belfry.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
informal crazy; very eccentric
[from bats-in-the-belfry (sense 2)]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
Slang. insane; crazy.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
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|Adj.||1.||bats - informal or slang terms for mentally irregular; "it used to drive my husband balmy"|
batty, bonkers, buggy, crackers, daft, dotty, haywire, kookie, kooky, loco, loony, around the bend, balmy, nuts, round the bend, wacky, whacky, nutty, barmy, loopy, fruity, cracked
insane - afflicted with or characteristic of mental derangement; "was declared insane"; "insane laughter"
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.