What is the meaning of whacking?

noun

• The act of inflicting corporal punishment with repeated blows.
  • synonyms: beating, thrashing, licking, drubbing, lacing, trouncing

verb

• Hit hard.
  • usage: "The teacher whacked the boy"
  • synonyms: whack, wham, whop, wallop

adjective

• British informal. ( enormous)
  • usage: "a whacking phone bill"; "a whacking lie"

adverb

• Extremely.
  • usage: "a whacking good story"