A tragic tale nearly on the same level as '
lol'
It used to mean that an edit was made to a program from a third party. These hacks were used in video game terms to be synonymous with cheat codes.
Then the normies got a hold of it.
Now it pretty much means a clever
trick, although with some of the ways that it is used, the '
trick' usually isn't clever at all.
Looking at you, 5-Minute Crafts