noun ·Common ·High school level

Definitions

Noun

1. 1
   A foolish or incompetent person. dated, rare, vulgar

Synonyms

All synonyms

addle pateaddle-brainaddleheadairheadalternative spelling of dumbass.ass

Antonyms

All antonyms

brain surgeonrocket scientist

Etymology

Unknown; speculatively, influence may flow (in some direction) among the following words: jackass, ninny, jackanapes, pickaninny.

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