Wiktionary
thumby
a. dirtied by thumb marks n. (context slang English) A little thumb; diminutive term for thumb
Wikipedia
Thumby
Thumby is a municipality in the district of Rendsburg-Eckernförde, in Schleswig-Holstein, Germany.
Usage examples of "thumby".
I can see her now, setting there working a pair of thumbies with her wooden skivers clacking away.
Hands into wife-knitted thumbies, took the rifle, box of cartridges in his pocket.