Here's why it might not be a real thing:
* "Slough" usually refers to a swampy or muddy area, not a specific type of animal.
* "Wolf" refers to a specific type of canine.
Possible Misinterpretations:
* "Slough" could be a misspelling of "slue" or "slew," which are terms for a twisting or turning movement. This could be related to a specific type of wolf behavior, but without more context, it's unclear.
* The term could be a fictional creation, perhaps from a book, movie, or game.
To clarify what you're looking for, it would be helpful to:
* Provide more context: Where did you hear this term?
* Spell it correctly: Are you sure it's "slough wolf"?
* Describe what you think it might be: What characteristics do you associate with it?
Let me know, and I'll do my best to help you find the answer!