To make the perfect historical movie or TV series, it's not enough to build a flawless set or hire an interior expert to stand behind your CGI artist. It's not enough to give the actors makeup in the spirit of the era and dress them in authentic costumes, sewn using the technology appropriate to the time.
There will always be something that is the most difficult to fake. Language, or rather slang. Perhaps the most accurate mirror in the world, reflecting the specifics of any time. Language lives with us and changes no less often than, for example, fashion, with words coming in and out of vogue. And this viral thread in the AskReddit community is dedicated to examples of such slang words considered 'outdated'.
More info: Reddit
