I do not and have never used "meth" or any of its variants. It is horrible stuff. Imo, drugs should only be prescribed by a doctor to resolve a health-related need.
One of my very nerdly friends used to say of me when a technical problem grabs me and I can't let go that I was "gacking" . He meant it well, and it is the only term that I know. He meant it about the taking about the VCR to clean it, (and I put them back together and they work) and not the drug use.
He would say things like:
- EngrStudent you are gacking again. (to me)
- EngrStudent was gacking, and we came up with this. (and we present awesome thing)
Another example is this (link) in Numb3rs with Charlie Eppes.
Can you describe a word that is okay in very high tech professional use that is a rough synonym of the behavior that is not (remotely) related to drug use? The deep obsession that it grabs me and doesn't let go. It is okay, but not necessarily desirable, if it is a high-function Asperger's related term.