not give a tinker's curse
not give (or care) a tinker's curse (or cuss or damn)not care at all. informal
In former times, tinkers (itinerant menders of pots, pans, and other metal utensils) had a reputation for using bad language. The expression is often shortened to not give a tinker's .
1984 Patrick O'Brian The Far Side of the World When I was a squeaker nobody gave a tinker's curse whether my daily workings were right or wrong.