Definition of knock or hit someone for six in English:

knock (or hit) someone for six

British informal Utterly surprise or overcome someone.
[alluding to the highest-scoring hit in cricket]
More example sentences
  • I am very angry if they put a ban on my business, it will knock me for six.
  • The sexual innuendo is so utterly out of left field that it knocks you for six.
  • I take each day as it comes but it knocks you for six.
See parent entry: six

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