adj. Once more with balls.
Related terms: nadtacular.
Real citation: “Why do dudes love Bruce Dickinson so much? Is it his operatic stylings? Could it be his chameleonlike ability to effortlessly change his career midstream? Or is it his Nadtastic outfits? No one knows for sure, not even Bruce!”
(Steben Wintle, Nov. 14, 2004, http://www.ottawaxpress.ca/books/books.aspx?iIDArticle=4724)
Made-up citation: "If testicular cancer were renamed 'nadtastic cancer,' scientists agree that very little grooviness would be added."