It could also have been "genial" which used to be the proper attribute of people like Einstein or Mozart and their works:
Die genialen Erkenntnisse Albert Einsteins führten die Physik in ein neues Zeitalter.
...but has somehow deteriorated, as nowadays it is likely to describe any experience from exceptional to significantly above average:
Deine Suppe ist genial. Gibst du mir das Rezept?
Genial, dass ich bei dem schönen Wetter einen Tag frei habe.
However, you would rather not call a woman "genial" if you think she's awesome, but some might choose to use it that way, too.
Others have come down, so it seems, to use it even for minor achievements like not leaving with wet pants after a visit in the bathroom (but you shouldn't take that last one literally :-).