Goldenkey might be referring to the euphemism treadmill mentioned in the summary of that article; the never-ending cycle of replacing neutral words for a group

Goldenkey might be referring to the euphemism treadmill mentioned in the summary of that article; the never-ending cycle of replacing neutral words for a group of people when they have (inevitably) shifted in meaning to a pejorative (like 'imbecile' and 'retard').