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.
Person 1: Hey, send a .gif file and type S/E/X. It'll cause the Discord S/E/X Hack!
Person 2: That won't work, would it? *types s/e/x*
*image pops up*
Both: WTF DISCORD SEX!!?!?!?!?!?!
The thing you can find on every dude's computer. So soft but STIFF. Wet Juicy but Dry and slighty moist busting all over her face BOOOOOOOOM every time YES OH GOD YES -----> O