Adj. Type of information carried around inside a man's head that he thinks is a mark of intelligence when in fact it is idiotic trivia. Ironically, in many cases everyone already knows the fact, or it is wrong.
Sally: Do you like my tan this summer?
Tim: Sure. Did you know that the mask in the movie "Halloween" was a Captain Kirk mask painted white?
Sally: Yes dear. Everyone knows that.
Tim: Well, did you know that the red dot on the 7-Up can represents the inventor's eye? He was an albino.
Sally: You are an idiot. Stop using such uselessful information.