a tinker's damn

rude slang That which has little or no value. Fred doesn't give a tinker's damn about what anyone else thinks of him. I was so excited when my grandfather said he'd give me his car, but this old clunker isn't worth a tinker's damn. I don't give a tinker's damn about making money, I just want to do something with my life that makes life better for others.

tinker's damn

Something of no value. Itinerant tinsmiths known as tinkers were roughand- ready men who saw no reason to watch their language. They swore so frequently that their curse words had no value for emphasis or anything else, and so something that was said to be worth a tinker's damn had no merit or value at all.