<p><strong>Verb</strong></p><ul><li>(used without object) plopped, plop·ping.</li><li>to make a sound like that of something falling or dropping into water: A frog plopped into the pond.</li><li>to fall with such a sound: Big raindrops plopped against the window.</li><li>to drop or fall with full force or direct impact: He plopped into a chair.</li></ul><p><strong>Noun</strong></p><ul><li>a plopping sound or fall.</li><li>the act of plopping.</li></ul><p><strong>Adverb</strong></p><ul><li>with a plop: The stone fell plop into the water.</li></ul><p><strong>Verb</strong></p><ul><li>(used with object) plopped, plop·ping.</li><li>to drop or set down heavily: She plopped her books on the desk.</li><li>to cause to plop: The fisherman plopped the bait into the river.</li></ul>