lackbrain

L1A1C3K5B3R1A1I1N1

noun

A person who lacks brains; an idiot.

Scrabble 17
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Meanings

nounlackbrain (plural lackbrains)

plural lackbrains

  1. derogatoryA person who lacks brains; an idiot.

    "Is that clear enough, even for you, lackbrain?"

    1995, Catherine Coulter, Lord of Falcon Ridge
    2 more examples

    Among themselves, his clerical brethren who employed him to produce revivals, acknowledged him to be but a pitiful lackbrain...

    1841, George Rogers, Tales from Life

    One moment I was staring up at that lackbrain Sister Margaret, and the next I was staring at that lackbrain chieftain...

    2007, Sandra Hill, Down and Dirty

Synonyms & antonyms

Also see
lack-mind

Origin

From lack + brain.

Full word history & related roots →
Cite this entry
APA

lackbrain. (n.d.). In WatkinsX Dictionary. Retrieved November 2, 2026, from https://dictionary.watkinsx.com/word/lackbrain

MLA

“lackbrain.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/lackbrain. Accessed November 2, 2026.

Chicago

WatkinsX Dictionary, s.v. “lackbrain,” accessed November 2, 2026, https://dictionary.watkinsx.com/word/lackbrain.

Source: lackbrain on Wiktionary, CC BY-SA 4.0.