An action or instance of alteration or disappearance of inconvenient or embarrassing documents, photographs, transcripts, or other records. From the novel 1984 by George Orwell, where Winston
In light of the public outcry over the book's racist imagery, the publishing house is memory-holing it by removing it from circulation.
Making an effort to hop between fond, old memories in order to displace or squelch the vividness of one's current (likely depressing) situation. Must last for more than a minute to qualify as a swim.
Yeah, since he lost his job and his girl, he'll just leave the TV off and go on a memory swim.
BOB: Soon I'll never forget anything again.
Burt: And why is that?
Bob: After watching this infomercial on TV last night I ordered the Memory Enhancer and because I was one of the first thousand callers I get not one but two pads of paper and two sharpened #2 pencils.