/wak"oh/ , n. , pl. wackos , adj. Slang.
n.
1. Also, wack . an eccentric, strange, or odd person.
adj.
2. wacky.
[ 1970-75, Amer.; see WACKY, -O ]
WACKO
Meaning of WACKO in English
Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012