tinker's dam

noun

1. tinker’s damn.
2. (in plumbing) a barrier for retaining molten solder within a certain area until it has cooled.

noun

1. the least value or merit; nothing or anything at all: It’s not worth a tinker’s damn.

Idioms

2. care/give a tinker’s damn, to have or feel little or no concern; be unaffected or unmoved: I don’t care a tinker’s damn for their opinions.

noun

1. slang the slightest heed (esp in the phrase not give a tinker’s damn or cuss)