skuggabaldur

Etymology
From 🇰🇲.

Noun

 * 1)  a creature from Icelandic folk belief who is the offspring of a tomcat (a male cat) and a vixen (female fox) or a bitch (female dog)
 * 2) an evil spirit
 * 3) an evildoer who anonymously commits outrages or evil deeds; a sneak