wack 
(wăk) Slang
(wăk) Slang n.
A person regarded as eccentric.
adj. wack·er, wack·est
Very bad: walked out of a really wack movie.
[Back-formation from WACKY.]
- inconsolability
- inconsolable
- inconsolableness
- inconsolably
- inconsonance
- inconsonant
- inconsonantly
- inconspicuous
- inconspicuously
- inconspicuousness
- inconstancy
- inconstant
- inconstantly
- inconsumable
- inconsumably
- incontestability
- incontestable
- incontestably
- incontinence
- incontinency
- incontinent
- incontinently
- incontrollable
- incontrovertibility
- incontrovertible