Having a superb quality of the nth degree. An inestimatable amount of superbity, often stated with inflection suggesting disbelief yet assuring a certain I-swear-this-is-true-ish-ness.
“Dude, did I just hear that right? Did she just tell him he’s “totally awesome” because he remembered to flush the toilet? He’s 22 for god’s sake… that’s just superdiculous!”