tinker's damn

or tinker's dam

noun

1. the least value or merit; nothing or anything at all:

   It's not worth a tinker's damn.

tinker's damn

noun

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

Word History and Origins

Origin of tinker's damn¹

First recorded in 1830–40; from tinkers' alleged habit of cursing frequently (hence weakening the force of a curse)

Idioms and Phrases

Idioms

1. 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.