Smooth-brained

adj, slang

adj, slang ·Common ·High school level

Definitions

Adjective
  1. 1
    Having a brain which is naturally smooth in appearance.
  2. 2
    Lissencephalic; having a brain which lacks convolutions due to malformation.
  3. 3
    Stupid, foolish; ignorant. derogatory, slang

    "All because a group of the wealthiest people on the planet since the pharaohs have convinced a bunch of smooth-brained rubes that “well-regulated” means that nearly everyone can get their very own murder machines."

Synonyms

All synonyms
harebrainedaddlebrainedaddlepatedairheadedass-brainedbaby-brained

Example

More examples

"All because a group of the wealthiest people on the planet since the pharaohs have convinced a bunch of smooth-brained rubes that “well-regulated” means that nearly everyone can get their very own murder machines."

Related phrases

smooth brain

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.