noun. ['ˈplɑːp'] the noise of a rounded object dropping into a liquid without a splash.
verb. ['ˈplɑːp'] set (something or oneself) down with or as if with a noise.
verb. ['ˈplɑːp'] drop something with a plopping sound.
adverb. ['ˈplɑːp'] with a short hollow thud.
verb. ['ˈplɑːp'] drop with the sound of something falling into water.