Vielfraß.

From Middle High German vilvrāz, from Old High German filifrāz. By surface analysis, viel (“much”) + Fraß, the latter being used here in the now obsolete sense “eater” (rather than “food”).

16th century, calque of Middle Low German vēlvrât (“wolverine”, literally “glutton”), also vēlvras, vēlvratz (this last being the earliest attested form in 1498). Further in all likelihood a folk-etymological alteration of Old Norse *fjallfress ~ *fellfross (literally “mountain cat”), from fjall, fell (“mountain”) + fress, *fross (“tomcat”). Compare Norwegian Nynorsk fjellfross. Further discussion The Old Norse origin has been disputed because Norwegian fjellfross (“wolverine”) is only found in local dialects and is attested later than the Middle Low German. Moreover, the German form was later borrowed into Danish and Swedish (see descendants below). The usual Scandinavian word for the animal is jerv, jærv, järv. Nevertheless, the etymology is now generally accepted on semantic grounds. The popular belief that the wolverine is particularly voracious only developed because of the name, not vice versa. Additionally, the existence of the Middle Low German forms in -s, -tz supports the derivation, because in a native compound we should expect only -t (and a borrowing from High German into Low German is not plausible for a Scandinavian animal in the 15th century).