An insult after you completely wreck someone. Can also be said as "You just got did dirty" It could be as simple as winning rock-paper-scissors, or as complex as beating someone in Madden. Said enough times in sequence and it can really be annoying.
Jimmy: Broh, I'm gonna score a Touchdown on this play!
Ron: Shut up, no you won't.
Jimmy: I told you I would! I just did you dirty