English

Alternative forms

• whacko

Adjective

wacko ‎(comparative more wacko, superlative most wacko)

1. (informal) Amusingly eccentric or irrational.

Noun

wacko ‎(plural wackos or wackoes)

1. (informal) An amusingly eccentric or irrational person.

Interjection

wacko

1. (Britain, dated) hurrah!
   • 1952, Anthony Buckeridge, Jennings and Darbishire

     "Wacko! There's a whole pile of letters for me," Jennings cried excitedly, hopping from one foot to the other.

Old High German

Noun

wacko ?

1. rock, boulder

Alternative forms

• waggo

Related terms

• wegan