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boat bug

noun
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Definition of boat bug

1 : any of numerous aquatic hemipterous insects (family Corixidae) having one pair of legs that resemble long oarlike paddles
2 : back swimmer

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“Boat bug.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/boat%20bug. Accessed 29 Mar. 2020.

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