adj. Really, really unbelievably, superhumanly cool, or "kickass." So kickass, in fact, that it is fantastic and spectacular and utterly amazing--awesome to the Nth degree.
"My god! Did you hear me PWN that pretentious new kid in Humanities class with my knowledge of his home country, and then did you see me kick him in his budding ovaries?"
"Yeah, man! That was fucking KICKASSTACULAR!"