Yes.
Gnrr also occurs in pants cuffs.
This word, and a few others that I can still remember, was in a book that we used to have in my school library in the sixties.
The only other word that I can remember distinctly is 'bimblewiffy' which is for the dust bunnies under couches and beds.
This predates Rich Hall's Sniglets by quite a bit and I would give a lot to find out the citation for the book itself.
Pls let me know if you get any further with it yourself.
Charlie Affel, Philadelphia