Does what it says. Always a nice surprise to read "Snake People" instead of "Millennials". 10/10 would recommend everyone to add it.

The internet is much better now
Edit: Also this addon is hilarious

Much more comprehensive than one might expect--this isn't just a simple s/millenials/snake people/g, instead containing a bunch of different replacements for your snaky pleasure. (Replacing "Generation Y" with "serpent society" has a particular brilliance to it.)

As another reviewer noted, the best thing you can do is forget that this is installed.