whack

1. whack somebody/something (+ adv./prep.) (informal) to hit somebody/something very hard
   • She whacked him with her handbag.
   • James whacked the ball over the net.
2. whack something + adv./prep. (informal) to put something somewhere without much care
   • Just whack your bags in the corner.
3. whack somebody (North American English, slang) to murder somebody