When someone takes a situation and over thinks it to the point of disaster.
Taking a simpleproblem and turning it into a Rube Goldberg type situation where the solution creates more problems then it solves.
Thinking a situation, that would otherwise be a simple solution if thought through properly, into a catastrophic conclusion.
While I knew the only problem with the car was that it needed new spark-plugs, Jake felt it was a better idea to gut the entire electrical system in what can only be described as a thinktastrophe!
He ended up disabling the entire car, ruining the electrical system and engine computer in the process.
Now the car doesn't work at all cause Jake's logic of "You can never be too sure".
The part of one's brain that actually does the thinking-as opposed to the areas that deal with sex ("Me want FUCK!"), food ("Me want peanut butter cups."), relationships ("Me want FUCK!"), seeking shelter/safety (frequently negotiated via demand for/willingness to provide sex and peanut butter cups), fashion sense ("You're going to wear THAT?").
Taking the college entrance exam really strained my "thinkulator"-I can tell because I notice a "fizzing" sensation in my head, then my eyes and ears start crossing and uncrossing.