1. Enormous
   "a whacking phone bill"; "a whacking lie"

1. To an abnormal extent
   "a whacking good story"

1. Hit hard
   "The teacher whackd the boy";
   - 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]
    
2. Get rid of (someone who may be a threat) by killing
   "the double agent was whacked";
   - neutralize, neutralise [Brit], liquidate, waste [informal], knock off [informal], do in [informal], clip [informal], take out [informal]

See also: big, bump off [informal], croak [informal], despatch [Brit], dispatch, large, murder, off [N. Amer, informal], polish off [informal], slay [literary]

Type of: hit, kill

Encyclopedia: Whack