Nastrond

Nástrǫnd (Old Norse "corpse shore") is a location in Helheimr where Níðhǫggr resides and feasts on corpses. It is the afterlife for those who have sins of murder, adultery, and oath-breaking (which the Norsemen considered the worst possible crimes).

Poetic Edda
The Vǫluspá says:

Prose Edda
Snorri Sturluson quotes this part of Völuspá in the Gylfaginning section of his Prose Edda. He uses the plural of the word: Nástrandir (Corpse Shores).