entropic debugging - noun phrase - The phenomenon in which one can spend weeks on end debugging something using a multitude of techniques, give up in frustration and/or disgust for a couple of days, come back to the project and discover that somehow the bugs have magickally fixed themselves (as verified by diffs and file hashes if one cares to check).  The phenomenon is so named due to the second law of thermodynamics, which states that entropy can never decrease, only increase in an isolated system.  In other words, as entropy increases overall in the universe it somehow wiped out the bugs in question.  See also kinetic pattern baldness.

wires - noun - Person to person backchannels.

"I had to pull some wires to get that expense report fixed before the boss saw it."

basketball mode - noun phrase - When a service or application crashes and restarts itself over and over, i.e., bouncing like a basketball every few seconds.  Considered an outage.

text message tunnel vision - noun phrase - When you get so fixated on texting that you forget that you can just voice call them.

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.

disasterbation - noun - Idly fantasizing about possible catastrophes (World War III, EMP strikes, nexus collapse, civil war, simulation hypothesis system shutdown, full-blown hyper-blight) without considering their likelihood or their possible solutions and preventions.  Very common in the prepper and futurist communities.

Source: M. Alan Kazlev (updated a bit and cross-referenced by me)

@here grenade - noun phrase - The act of tagging a message @here (meaning, everyone) in a crowded Slack channel (users >= 100), causing everyone who's busy but monitoring to drop whatever they're doing and flame you for bothering them by messaging @here.  Normally done by a user trying to get a response to a maximum severity ticket that's been ignored for longer than the SLA.

Example: "PFY threw an @here grenade into the #tech-support channel because the border router was on fire and the admins on call were ignoring their pagers.  He got kicked but at least the outage is over."

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.

Trapdoor goalposts - noun phrase - When two or more requirements are set up so that meeting one automatically means failing another. This is a bad faith argument whereby it is impossible to meet the requirements someone sets, without admitting refusal to allow the outcome the other person desires.

Example:
"If you're making a decent income you can't possibly talk about poverty, you don't know what you're talking about."
"I'm actually below the poverty line."
"You just want a handout!"