The behaviors that kick in when you are about to leave something, usually a job. There are two facets, one is that all of the little crap that you've been ignoring and tolerating starts driving you crazy. The other is the idea that you're leaving anyway so you can get away with anything.
The accountant with short timer syndrome was thinking about wearing flip flops to work during his last two weeks before starting a new job. And the short timer in Ann Arbor, about to move to Buffalo had to resist the urge to strangle all of the smug half-wit aging hippies.