During Charlie Sheen's "reinvention" of himself as a tiger-blood-dripping warlock, one of his favorite mantras is "WINNING!" This particular usage is most common on Twitter, where the pound symbol (#) indicates a trending topic to follow.
Face it folks, you just feel better when you say it. #WINNING
RT @ParisHilton @CharlieSheen Hey Neighbor, I think I might have #Tigerblood ;) and I'm definitely #Winning! Can't wait for #Sheen's-Korner