Fimbul is an Old Norse word often used as a prefix for "giant" or "mighty", and may refer to: Fimbul Glacier, Greenland. Fimbul Ice Shelf, Antarctica. Musical works. Fimbulvetr, a song by Danheim for his album Herja. See also. Fimbulheimen, Antarctica. Fimbulisen, Svalbard. Fimbulwinter, the prelude to the events of Ragnarök https://en.wikipedia.org/wiki/Fimbul