Javanese/Indonesian term (insult) to describe a person who's confused while other people around him are doing an activity, or can also be used to insult someone who has a stupid face or is dumbfounded with their mouth hanging open.
Mr. X: Hey, how you doing?
Mr. J: I'm great ahahahhah
Mr. X: So it's been 2 years, when will you pay off the debt?
Mr. J: *plonga-plongo
a plorno is a porno with a plot. The playboy channel has good plornos, sso does hbo.
after my girlfriend and i finished with each other on the trampoline we walked in and sawkevin masterbating to a plorno on hbo. needless to say we went back to the trampoline and had more fun, thanks 8 ball