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thwacker

noun
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thwack·​er | \ -kə(r) \
plural -s

Definition of thwacker

: one that thwacks specifically : a wooden implement with which a half-dried pantile is beaten to take out any warping

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“Thwacker.” The Merriam-Webster.com Dictionary, Merriam-Webster Inc., https://www.merriam-webster.com/dictionary/thwacker. Accessed 20 January 2020.

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