Sentence:  Another night, as we were scudding before a heavy gale of wind, and a tremendous sea rolling after us, we had the misfortune to be <WSD>pooped</WSD>, as the phrase is, by a wave or sea striking our stern, which stove in the cabin-windows, and rushing impetuously through the cabin, and along the main-deck, bore down all before it. 
Meaning of the word marked with <WSD> tags:  To break seawater with the poop of a vessel, especially the poop deck.