whack·o 
(wăkō, hwăkō)
(wăkō, hwăkō)n.
Slang
Slang
Variant of wacko.
- southeast by east
- southeast by south
- southeaster
- southeasterly
- southeastern
- southeastward
- southeastwardly
- southeastwards
- Southend-on-Sea
- souther
- southerly
- southern
- Southern Alps
- southern beech
- Southern blot analysis
- Southern Bug
- Southern Cross
- Southern Crown
- southerner
- Southern Hemisphere
- Southernism
- southern lights
- southernmost
- southernness
- Southern Ocean