E-thumb Definition

noun

(US, idiomatic) A natural skill for tinkering with electronics; or computers.

Oh, I'll never have an e thumb, no matter how long I stay at it. Nothing ever seems to work for me. Everything I program crashes.
Wiktionary
(US) A person with this skill.
I should ask the e thumb next door what he recommends for my BSOD.
Wiktionary