Abbreviation for the slash pairing of Ryan Dunn and Bam Margera. If they got any publicly gayer, slash writers wouldn't even have to use their imaginations.
The bam_ryan_otp community on livejournal is basically the center of the Dugera universe.
Bam and Ryan (Dugera) "joke" about screwing each other all the time. They've done a lot of REALLY gay publicity stunts, and just looking at pictures of them you can tell.
One of the preferred alternatives to "The Dude" if you're not into that whole brevity thing. Known to be a laid back, often lazy, pot smoker. Other alternatives are His Dudeness or Duder.