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off-the-wall

[awf-th uh-wawl, of-]
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adjective Informal.
  1. markedly unconventional; bizarre; oddball: an unpredictable, off-the-wall personality.
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Origin of off-the-wall

First recorded in 1970–75
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Related Words

insane, crazy, stupid, incoherent, unreasonable, preposterous, unsound, wrong, ridiculous, absurd, unwise, foolish, aberrant, cordial, amiable, festive, buoyant, jolly, pleasant, good-natured

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British Dictionary definitions for off-the-wall

off-the-wall

adjective
  1. (off the wall when postpositive) slang new or unexpected in an unconventional or eccentric wayan off-the-wall approach to humour
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Word Origin

C20: possibly from the use of the phrase in handball and squash to describe a shot that is unexpected
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