From Longman Dictionary of Contemporary Englishplop (yourself) downplop (yourself) downSITto sit down or lie down heavily She plopped down on the sofa beside me. → plop
Examples from the Corpus
plop (yourself) down• Our friend Joan strolls into the bank and plops down $ 100 to open an account.• The coyote returned to the barn end and plopped down in front of the crowd of llamas.• She plops down on the empty cot and lifts a curtain to peer out the window.• Stanley plopped down on the sofa beside me.• Carefully, slowly, not at all certain why, they plopped down on to the branch.• She plopped down too much mortar, smoothed it out and set a brick on it.• On our other side a young couple wandered by and plopped down with only a six-pack and a sleeping bag. 