You're "Mr. Lebowski." I'm the Dude. So that's what you call me. You know, that or, uh, His Dudeness, or uh, Duder, or... El Duderino, if you're not into the whole brevity thing...
Seriously dude, when teenage mutant ninja tortoise were at their height of popularity, and i was a wee one, i didst hear many a time that "dude" did refer to something rather more phallic. Oh those innocent days! DUDE!