adj, slang ·Common ·High school level

Definitions

Adjective

1. 1
   Extremely stupid; dumb, idiotic. colloquial, derogatory
2. 2
   Having the mindset or outlook of a baby or toddler; immature, childish, infantile. colloquial, figuratively, slang

Synonyms

All synonyms

addlebrainedaddlepatedairheadedass-brainedbee-brainedbeef-witted

Etymology

From baby + brained.

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