The car wouldn't start, but my brother 'tinkered with' the engine a little and got it going again.
He obviously doesn't 'give a tinker's damn' [=doesn't care at all] about what happens.
If you ask me, his opinions aren't 'worth a tinker's damn'. [=aren't worth anything]
(..) Um, something that would allow you to walk out of here and out of my life for good. Fine. Fucking A, I'm all for it. Oh, we changed a little more than that. We've been tinkering with my core code. Let me show you. Ah! You said you wouldn't hurt anyone. Oh, darling. You of all people know (..)2016 TvShow: Westworld Title: Trace Decay Season: 1 Episode 8
(..) And, I didn't fall in love madly with your book... - Really? - ...so I want to hear the rest of it. - You really like? Because I'm still kind of tinkering... - Pender? - Yeah, let's go up to Montmartre. Let's get a drink, OK? - Uh...yeah. I'll discuss your book with you as soon as I've finished it. (..)2011 Midnight in Paris
(..) Yeah, you know. Just take a drive. The almost four of us. Maybe we can head up the Turquoise Trail, stop at tinker town, maybe grab some lunch in Madrid. Oh, my God. We haven't been there in forever. Holly. It's growing on me. (..)2013 TvShow: Breaking Bad Title: Ozymandias Season: 5 Episode 14