1plop 
/ˈplɑ:p/ verb
plops; plopped; plop·ping always followed by an adverb or preposition /ˈplɑ:p/ verb informal 1 [no obj] : to fall, drop, or move with a sound like something dropping into liquid
▪ The stone plopped into the river. ▪ An ice cube plopped noisily into the glass. 2 [+ obj] : to drop (something) into a liquid so that it makes a splashing sound
▪ I filled the glass with water and plopped a few ice cubes into it. 3 : to sit or lie down in a heavy or careless way : to allow your body to drop heavily or carelessly [no obj] ▪ She plopped onto the couch. ▪ They plopped down on the floor. [+ obj] ▪ He plopped himself down in the chair. 4 [+ obj] : to drop or place (something or someone) in a heavy or careless way : plunk
▪ He plopped the tray down. ▪ The article warns parents against plopping their toddlers in front of the TV for hours on end.
▪ The stone plopped into the river. ▪ An ice cube plopped noisily into the glass.
▪ I filled the glass with water and plopped a few ice cubes into it.
▪ He plopped the tray down. ▪ The article warns parents against plopping their toddlers in front of the TV for hours on end.
plop down [phrasal verb]
plop down (money) or plop (money) down US, informal : to pay or spend (money)
▪ I can't afford to just plop down [=plunk down] $30 for a T-shirt.
▪ I can't afford to just plop down [=plunk down] $30 for a T-shirt.
