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!"

Taxonomic debt - noun phrase - The time you spend learning arbitrary jargon at a new job.

Source: Bradford Stephens
 

technical heresy - noun phrase - Openly demonstrating the imagination to come up with actual uses for a platform or application that it is currently popular to hate.

maintenance contention - noun phrase - When there is only one bathroom but two people need it for the exact same urgent thing.

rotten egg dependency - noun phrase -  A service that a mission-critical application relies upon that nobody knows about but brings everything to a screaming halt when something happens to it.  In a sane world, said dependency should have nothing at all to do with the thing that just crashed.  Called this because it's as pleasant a surprise as a rotten easter egg at breakfast.  Best explicated by the following haiku:

It's not DNS
There's no way it's DNS
It was DNS