a tinker's damn

The phrase "a tinker's damn" is an idiomatic expression used to convey a strong sense of indifference or lack of concern. It originates from the occupation of a tinker, a historical term for an itinerant mender of household items or tinware. A tinker would often use a small amount of molten tin or solder to repair damaged metalwares by creating a temporary seal. Therefore, a "tinker's damn" refers to something of such minimal value or importance that it can be disregarded as insignificant or worthless, just like the worthlessness of the temporary seal created by a tinker.