Wacko

Pronunciation

• Rhymes: -ækəʊ

Alternative forms

• whacko

Origin

wack(y) + -o

Full definition of wacko

Adjective

1. amusingly eccentric or irrational

Noun

1. An amusingly eccentric or irrational person.

Interjection

1. (British, 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.----