Discord S/E/X Hack

When using Discord, if a user sends a .gif file and then writes 's/e/x' it will turn the gif into an image with instructions on how to pull off the Discord S/E/X hack. This is caused by the fact that every gif is technically a Tenor image, and s/ is supposed to mean substitute. The s/e/x message technically means 'Substitute the letter E with the letter X.'
The tenor link becomes a 'txnor' link, which shows the image. Going to txnor.com shows how the creator of the hack made the hack.