wacko

wack-o · noun

imported

Definitions

noun

  1. 1.

    (Informal) A person who is considered crazy or eccentric.

  2. 2.

    (Informal) Crazy or bizarre.

Forms

plural: wackos

Related words

Antonyms: normal person
See also: crazy, eccentric, wacky
Synonyms: crazy person, eccentric, lunatic, nutcase

Etymology

From wacky with the suffix -o, formed in American English slang during the mid-20th century.