the sound when toilet water touches your but . if you hear this sound get tested and if it was not you that made that sound prey for the other person.
To clumsily fall onto something
I was tired, so I plopped onto my bed
a light insult. Means that you´re a dumb/stupid person. But not really, your pal is just messing around with you.
"I like Tik Tok."
"(SHUT UP) YOU PLOP"