WACKO


Meaning of WACKO in English

(also whacko ) informal, chiefly N. Amer.

■ adjective mad; insane.

■ noun ( plural ~s or ~es ) a crazy person.

Origin

1970s: from wacky + -o .

Concise Oxford English vocab.      Сжатый оксфордский словарь английского языка.