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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

psychopath, maniac, schizophrenic, idiot, boob, nerd, ass, stooge, jerk, sucker, clown, twit, buffoon, nitwit, moron, screwball, crackpot, lunatic, nut, crazy

British Dictionary definitions for lamebrain


  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