n. See 2d poppy.verb-intransitive. To make a noise; to pop; also, to break wind.n. A deck raised above the after part of a vessel; the hindmost or after part of a vessel's hull; also, a cabin covered by such a deck. See Poop deck, under deck. See also roundhouse.v. To break over the poop or stern, as a wave.v. To strike in the stern, as by collision.