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.]
- prophet
- prophetess
- prophethood
- prophetic
- prophetical
- prophetically
- propheticalness
- prophylactic
- prophylactically
- prophylaxis
- propinquity
- propiomazine
- propionaldehyde
- propionate
- propionic acid
- propitiable
- propitiate
- propitiation
- propitiative
- propitiator
- propitiatorily
- propitiatory
- propitious
- propitiously
- propitiousness