[iuhjyftgrd]

Used 'correctly' it means a minicab.

It comes from a 19th century French slang for a horse for hire (hack ney) which became hackney carriage (the British legal term for a minicab) being any vehicle you could just hire for a trip.

Then it came to be used for freelance writers - who could be hired to write what you wanted. Especially journalists on British newspapers where the term 'hack' comes from.

Hacker in the sense of somebody who does boring unpleasant work for hire is considerably older than it's usage to mean somebody who tinkers with things for fun.

[stan_rogers]

I think you'll find the derivation for this usage is actually hacher (to chop or hack; hatchet comes from the same root borrowing), and means one who works in an inelegant manner (hacks away at a problem until it is solved). The British usage of bodger (outside of the realm of making greenwood chairs) would be more-or-less equivalent.