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1. Hit hard
   "The teacher walloped the boy";
   - sock, bop, whop, whap, bonk, bash, whack, wham, clock [Brit, informal]
    
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: walloping, walloped, wallops

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

Encyclopedia: Wallop