WordWeb Online

1. Exhausted or worn out

1. Hit hard
   "The teacher whacked the boy"; "He whacked his opponent";
   - sock [informal], bop [informal], whop [informal], whap [N. Amer, informal], bonk [informal], bash [informal], clonk [informal], boink [N. Amer, informal], wham [informal], wallop [informal], lamp [UK, informal], clock [UK, informal], belt [informal]

See also: tired

Type of: hit

Encyclopedia: Whack