Plop

verb. To sit or lie down in a heavy or careless way.
To fuck.

To take a shit.

To inhale/devour a meal quickly
"Plop er down"= to have sex with

Seaver plopped down on the couch to take a nap after he was finished plopping on some lukewarm Stripes breakfast tacos and ploppin some nuggets on the commode.