Earlier quoted context omitted.
Bigoted dog whistle borrowed from literal Nazis. Edit: interesting that there are so many downvotes. Consider yourself lucky that this seems absurd to you, because it's borrowed directly from Nazi "degenerate art" and "degenerate music" and used like this almost exclusively in modern alt-right contexts to mean those falling outside of their ideal (bigoted) worldview.
I used the word "degenerate" myself the other day ( https://news.ycombinator.com/item?id=24041589 ) and assure you it wasn't any kind of dog whistle. Obviously the GP should have ommitted that flamebait ( https://news.ycombinator.com/item?id=24160738 ), but a comment like yours also breaks the site guidelines—specifically this one: " Please respond to the strongest plausible interpretation of what someone says, not a…
In-context, it's clear what degenerate meant.