extended form of wack, by 1971.
"crazy person," 1938, back-formation from wacky. Adjective in slang sense of "worthless, stupid," is attested from late 1990s.
updated on September 28, 2017
W.C.
WAC
wack
wacke
wackjob
wacko
wacky
wad
wadding
waddle
wade
