What does scug mean?

context doesn't say anything more. but I guess it's NOT anything abbreviation.
I come along this word in donald barthelme's Snow White, page 37.
Thanks for your help.

Tell us where you are in the book. My 1972 Antheum paperback page 37 begins "SNOW WHITE was cleaning. "Book lice do not bite people," she said to herself. [etc.]"; no 'scug' on that page. Oh, OK, on my page 31. You're right, no context whatever, and presumably not an abbreviation. Probably a made-up nonsense word for its emotional weight rather than carrying any meaning, but let's see if anyone can contribute anything better.

I don't know if the following is better but here goes:

From: machaut.uchicago.edu

Scug (?), v. i. [Cf. Dan. skugge to darken, a shade, SW. skugga to shade, a shade, Icel. skuggja to shade, skuggi a shade.] To hide. [Prov. Eng.] Halliwell.

Scug, n. A place of shelter; the declivity of a hill. [Prov. Eng.] Halliwell.

Scug
Noun
Definition 1: The hair that accumulates on the drain of a shower after use.
Usage Example: When I went into the shower this morning, the scug on top of the drain nearly blocked the water from going down.