WordWeb Online

1. Hit hard
   - whack, wham, whop
    
2. Defeat soundly and utterly
   "We'll wallop them!"

1. A forceful consequence; a strong effect
   "the book packs a wallop"
   - impact
    
2. A severe blow

Derived forms: wallops, walloping, walloped

See also: walloper, walloping

Type of: blow, consequence, defeat, effect, event, get the better of, hit, issue, outcome, overcome, result, upshot

Encyclopedia: Wallop