plarf was originally meant to describe a nasty shit but is now mainly used to evoke frustration, disappointment or apathy.
(from "man, i just plarfed my brains out" to, simply, "plarf.")
plang is a melancholy term that is always written in lowercase and usually involves elipses. Its origin stems from a commenter on TheStreet.com who tends to hold a negative view of the world, but rarely expresses it in an enthusiastic manner. It can be used as a noun, interjection, verb, adjective, or adverb, depending on the context and added letters. (Also acceptable: plangy, planged, planging, planger)
"There's a nuclear bomb headed directly toward my house. plang."
"Don't invite Sam to the party. He's such a planger."
"the average joe should not be able to get a loan..
on 5/14/10 7:27 AM"
"without fannie there would be no real estate market.with the US 16 months into a growing depression fannie is the sole lender...
on 5/10/10 5:51 PM"