lizard brain

Fetched 2026-10-26 (cache).

Datamuse reports no synonyms or antonyms for this word.

Noun

1. {{tlb|en|informal}} The most [[primitive]] part of the [[brain]]; the [[brain stem]].
2. {{lb|en|by extension}} Any [[part]] of a [[person]]'s [[psyche]] or [[personality]] [[dominate]]d by [[instinct]] or [[impulse]] rather than [[rational]] [[thought]].
3. {{lb|en|by extension}} Any [[part]] of a [[person]]'s [[mind]] [[concern]]ed with [[automatic]], [[repetitive]] [[task]]s rather than [[emotion]].
4. {{&lit|en}}

Source: Wiktionary · CC BY-SA 4.0 (Wiktionary dump) · cached copy, not a rewrite.