Why English is Whack.
Google Definition: whack (general verb, action)
1. the sound made by a sharp swift blow
2. knock: the act of hitting vigorously; "he gave the table a whack"
3. hit hard; "The teacher whacked the boy"
Slang Definition (more appropriate), provided by Urban Dictionary: whack
1. adjective; appalling in nature, unconventional.2. verb; to strike one with the hand or fist.3. verb; to assassinate. 4. adjective: crazy, ridiculous