Whacky
/ˈwæki/noun
Unconventional, eccentric, or silly.
Did you know?Whacky is a spelling variant of wacky, which comes from 20th-century American slang for something odd or crazy, not from any ancient occult source.
Etymological Timeline
20th Century
English
wacky
“Slang for odd, eccentric, or crazy”
20th Century
English
whacky
“Variant spelling of wacky”
Middle English
English
whakken
“To strike or hit”
Old English
OE
hwaccian
“To make a sharp sound or crack”
Proto-Indo-European
PIE
*kʷak-
“An imitative root associated with sharp sounds”