The site is called the HR Capitalist, so it makes sense that some of the HR Slang we throw around has an Ayn Rand flavor. The good news for you is that using HR Slang with an Ayn Rand twist makes you look smart to the capitalists who run your company.
Today's term - Going Galt:
"Easy! Just go Galt."
So that's your official definition - you'll need that for context and the first part of the description to others about what the term means. Here's your HR version:
Going Galt: (HR/Human Capital version) Occurs when an high performing individual contributor is so revolted by how his or her manager/company manages non-performers that they cease to give a s*** about giving discretionary effort and as Peter Gibbons once so profoundly stated, "work just hard enough not to get fired."
"When are they going to do something about Bob? Why should I work hard?
"I haven't seen you tinkering around with that new product idea. What's up with that these days?"
"That's on the back burner. Great ideas don't matter here, everyone gets the same thing. I've gone galt."
Performance is flat in the org? Chances are your best people have gone galt.