A combination of the words "sarcasm" and "awesome"...A use of the word "awesome" when the intent is obviously sarcastic. If properly understood, the response may be I know, right?
Joe (in his car, on the phone): Hey Bob, I'm stuck in traffic, by the time I get there to pick you up, happy hour will be over.
Bob (waiting for Joe at his house): *Awesome*
Joe: Are you serious?
Bob: No, I thought you'd be able to tell that was sarcawesome.