I thought it was 'memory hole'?
Now you can edit your post just like Winston Smith editing past editions of the Times.
(
Honourable Member is upstanding,
Wed 13 Nov 2013, 22:36,
archived)
Gah! Beaten to it again
(
drimble he'd been white, he'd been black,
Wed 13 Nov 2013, 22:37,
archived)