The smallest degree or amount.
Property that is not worth a tinker's damn.
Something of no value.
Origin of tinker-s-damn
- Probably from the reputation of tinkers for cursing
From American Heritage Dictionary of the English Language, 5th Edition
- However, this is just polish added to an old phrase, as not worth a damn predates the use of tinker's damn. The reference to tinkers was added for emphasis and colour - tinkers were known for swearing, so a damn from a tinker was particularly worthless. Also, it was a way, as with "Fudge" or "Geez Louise" or a million other soft-core curses, to avoid saying the actual word "damn" while pronouncing the word "dam".