Luskemus

Describes a person (typically female) that is slightly creepy and tends to sneak around. Based on the Norwegian word "Å luske" and "mus" which means mouse.
Luskemus is a usually pictured as the Luskemann's wife and also be used to scare children away from walking alone outside in the dark.

Similar words: Luske Leif, Luskemann, Lurker

"You are such a Luskemus"
"Why is she so mysterious? She must be a Luskemus"