ETYMOLOGY
from grizzle (to grin or laugh [Eng. dial.]) + ???
EXAMPLE
“… Bed-blonket akether! Ha! zey zitch a word more, chell cotton thy wastecoat. Chell thong tha, chell gi’ tha zitch a strat in tha chups, ya grizzledemundy. …”
From: The Gentleman’s Magazine
Volume 16, 1746
An Exmoor Scolding; In the Propriety and Decency of Exmoor Language, between two Sisters
Lexicophilia 