Word.ws English Dictionary

smooth brain

smooth brain noun: a stupid person.

Noun

smooth brain (plural smooth brains)

  1. (derogatory, offensive) A stupid person.
    • I could not have made it easier for you smooth brains, yet you still messed up!
  2. (derogatory, offensive) Used other than figuratively or idiomatically: see smooth, brain.

Synonyms of smooth brain

30 more synonymsFewer synonyms

Forms of smooth brain

pluralsmooth brains
alternative formsmoothbrain

Origin of smooth brain

Nominalization of smooth-brained, possibly by reference to lissencephaly (a brain abnormality, usually resulting in severe developmental delay, characterized by the surface of the brain being smooth), or simply by reference to the human brain typically being wrinkly.

Questions about smooth brain

What does smooth brain mean?
Smooth brain means a stupid person.
What part of speech is smooth brain?
Smooth brain is a noun.
What is the plural of smooth brain?
The plural of smooth brain is smooth brains.

Words near smooth brain in the dictionary

  1. smooth as silk
  2. smooth away
  3. smooth azalea
  4. smooth azaleas
  5. smooth bedstraw
  6. smooth brain
  7. smooth brains
  8. smooth breathing
  9. smooth breathings
  10. smooth brome
  11. smooth bromes

Source and license

Adapted from Wiktionary: smooth brain (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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Cite this entry: “smooth brain.” Word.ws, https://word.ws/smooth_brain. Based on Wiktionary, CC BY-SA 4.0.