Knock Timber Rebus #965

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Do you need a little help? Click to reveal a clue to the above Rebus.
Here is a clue to help decipher the hidden meaning. To rap on something made of wood.

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Do you think you have got it? Click to view the answer.
The word “Knock” is on the word “Timber” [Wood], to give the answer: Knock On Wood.
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