DC AC - noun phrase (humorous) - The primary mechanism of air conditioning inside the DC Beltway. Notionally, the movement of air due to revolving doors caused by the never-ending cycle of contractors becoming civil servants, civil servants becoming lobbyists, and lobbyists forming startups and becoming government contractors once more.
profit harvesting - noun phrase - A polite name for the act of finding each and every little remaining way to gouge money from someone or out of some thing. Called nickel and diming when hard currency was more common.
Proper channels excise tax - noun phrase - The markup paid on commonplace things when you go through proper channels at work to do something rather than going rogue, buying it yourself and filing an expense report. For example, a flight from Chicago to Boston might cost $176us if you paid for it yourself, but by using your employer's internal processes and vendors the cost of the same flight is closer to $630us.