if you press alt f4 in minecraft you will get free diamonds

The way to get free diamonds on minecraft

Alt-F4 is a shortcut in World of Warcraft to make your mage cast a spell that vanishes the player who casts it. It was unused and a mistake that was put in by the devs, and they might patch it. It's pretty useful.

A commonly used slang to troll unsuspecting victims into closing there game.This is very common on shooters

when you are in online school during a class and then suddenly the teacher lacks good internet, so you tell him or her to do alt f4 to "fix it" but it closes. To do this your teacher has to be a boomer or it might not work.

Something dumb people would say to get dumber people out of their Minecraft server.