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See more synonyms for lamebrain on Thesaurus.com
noun Informal.
  1. a dunce; booby; fool.
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Origin of lamebrain

First recorded in 1925–30; lame1 + brain
Related formslame·brained, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Related Words for lamebrained

mindless, ill-considered, irrational, senseless, stupid, careless, ill-advised, foolish, reckless, unimaginable, incredible, preposterous, astonishing, improbable, outlandish, implausible, impossible, inconceivable, unthinkable, dummy

British Dictionary definitions for lamebrained


  1. informal a stupid or slow-witted person
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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