A combination of the words Rob and ridonkuolous, meaning doing something awesome but injuring somebody in the process. Rob is referencing the name Robert, because most Roberts tend to be violent. Also, ridonkulous things tend to be awesome.
Tom: Dude, did you see that guy do a triple kiss-of-death backflip off a bridge on the news yesterday?
Jerry: Yeah, man. Too bad he missed the river and landed on an innocentpedestrian.
Also known as "the grade eight word", is the epic combination of five non-dictionary words, plus the optional prefix of "Epic" that are used quite frequently by people in today's society, more often teenagers. It's nickname ("The Grade Eight Word") originates from the location it was coined, a grade eight classroom. When someone thoroughly and utterly triumphs over the competition, this can be referred to as Epic Legit Uber Redonkulous Noob Pwnage.