Editgate was a term coined by a fellow spud for HIAG's monumental **** up of a wum attempt.
Basically HIAG tried to wum and as usual it blew up in his face. Instead of admitting he got it wrong, he scrambled to try and cover up his embarrassment and went back and edited his comments, but in true twattery style he forgot that I'd already quoted his comments

so it made him look even more stupid trying to deny it. Then, in sheer desperation he went from editing his comments, to claiming that I'd edited them, to claiming they hadn't been edited at all.
What made it even funnier was that he didn't just do it on one thread, he did it simultaneously across two threads and had to desperately backtrack to try and edit his comments. I even gave him a chance right at the start to check to see if he'd made a mistake, but he ploughed on head first into a complete shambles of wum **** up.
You can view HIAG's car crash wum attempt here:
http://www.not606.com/threads/maureen-watch.307892/#post-8222324
and here:
http://www.not606.com/threads/the-daily-arsenal.305998/page-4#post-8222411