also called
grit and
tweakables in New Mexico. The users thereof are frequently refered to in terms of
tweaking or
sketching.
The use of this leads to the accumulation of derelict electronic devices, most of which worked quite well before ther tweaker got their hands on it and tried to make it work better.
I once spent 17 days awake on this stuff 10-12 years ago. I wouldn't recommend this for the weak-willed. By day 12 I thought I was gonna die. By day 15, I was wishing I would. In neither case did I refuse the next line, though.