When abusing someone in the heat of the moment, you can't decide whether to call them a fag or a fuck. So you call them a fack.

It's a ship between Jack Dylan Grazer and Finn Wolfhard.

Facking is the 'art' of fake hacking someone's Facebook/Twitter/... account. In this process the user has just left his account logged in or given the password to the 'Facker'.

How people in London say the F word, sometimes people would pronounce it fark, Fock, fack or f*ck

For when you dont want to say fuck

A mis-spelling of the word "frack" - a euphemism for the word "fuck" coined by the creators of the original / classic "Battlestar Galactica" TV series to curse on-air and bypass the censors at the same time.

VERB

1. fake hacking. usually done when using javascript commands such as

javascript: document.body.contentEditable = 'true'; document.designMode = 'on'; void 0

or using some web browsers' ability to edit the source code (ie Google Chrome's "inspect element" function).
this is done to edit the webpage, and is widely regarded as "hacking".

2. when someone (usually girls) opens up facebook on a friend's computer and see that their friend is logged in, and posts as that friend.

However, neither of these are actually hacking, as there is no permanent edit on the actually website itself, and the web server was not broken into to achieve this.