Not the dumbest I've met, as the racists and 13 year olds take the cake-- but there are some characters on DoA...there's a guy named "The Champ." The Champ only refers to himself in 3rd person and talks to himself most of the time.
"The Champ gonna to take you all"
"oooh the Champ don't like dat shit"
"Yeah! The Champ kicked yo ass that round..."
He's really good, one of the higher ranked players, but he needs to lose the Muhammed Ali complex....
another time, I was in a DoA room with a bunch of people and there was a girl in there-- which means everyone automatically turns into the funniest/smartest guy in the history of the world, right? Her name is Spiffy Mai and she said she was a KoF fan...
after saying that, this one kid starts talking about the entire history of the KoF franchise for literally a couple minutes straight. Everyone stayed quiet while he was talking, not sure why, but he just went on and on and on... Then when he's done, it's still quiet and the girl says "hmmm, I think he's a little to dominant for me..." and everyone started laughing at the kid. he just left the room without saying anything.