rub-a-dub

[ ruhb-uh-duhb ]
/ ˈrʌb əˌdʌb /
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noun

the sound of a drum when beaten.

Origin of rub-a-dub

First recorded in 1780–90; imitative
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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