Single word for old and many-times-seen content

Using old as a starting word, Urban Dictionary suggested:

Obsolete
Outdated
Archaic
Ancient
Retro
Passe

And I have to say that none of them really fit. The first two can describe software, but you don't update your old memes, they just get old and you rarely re-see them in a fit of nostalgia, deep inside your archives. #3 and #4 can be used in phrase describing how old is this post (e.g. ancient as mammoth's $#!@). But hey, that's a phrase, not a single word! #5 is about the style, not the freshness. #6 is completely about fashion (e.g. MySpace is so passe).
A friend of mine suggested retoast, but I'm unsure because I haven't really seen the usage.
Your suggestions?

Update: Very sorry to break the rules, adding an example usage now.

Oh no, grandpa saw a pack of my business cards, and added me to his hilarious e-mailing list, consisting of ????? from 2007.

Also, if any of you guys surf russian internets, you may be familiar with баян. I need precisely that translated. It is a common (first) comment to many posts in social networks, as re-posting happens quite often

Update 2: The small thing that I forgot to mention is that it's a noun in russian, I will sure accept the fact that there are no such, but it would be much more familiar to talk of information units, calling them ????? than saying that they are bromidic, for example. I find bromidic kinda 30% suitable, but I guess I can't derive a bromid noun? So the speech contruction becomes longer, which is undesirable

Solution 1:

Old is (generally) an adjective in English. So all its synonyms are likely to be adjectives as well.

Going off your original post, I would absolutely use "tired", "ancient", or "antiquated", depending on what you're trying to convey. Tired suggests it's long-since gone out of fashion but is still in use, while ancient suggests it's no longer in common usage, but was at one point. Antiquated further conveys that in addition to no longer being used, it's out of fashion.

Tired: hackneyed; stale: the same tired old jokes.

Ancient: Of, relating to, or belonging to times long past

Antiquated: Too old to be fashionable, suitable, or useful; outmoded.

Paired with "memes" (as you do in the question, with "old memes") this conveys exactly what I think you're getting at:

Oh no, grandpa saw a pack of my business cards, and added me to his hilarious e-mailing list, consisting of tired memes from 2007.

But if the one-word requirement is stronger than a requirement for common usage, "antiquities" might be sufficient. It doesn't convey the same condescending tone as tired or antiquated, but it does convey that something is dated:

Oh no, grandpa saw a pack of my business cards, and added me to his hilarious e-mailing list, consisting of antiquities from 2007.

Alternatively "crap" would convey that it's useless, but the reader has to infer that it's also dated by the "from 2007".

You'll notice that now the sentence doesn't clearly convey what is being emailed. I think that's going to be somewhat tricky to avoid with a single word because the condescension stems from pairing a derogatory or dismissive adjective with a normally neutral or positive noun like meme.

Neutral:

Grandpa sent me memes from 2007.

Condescending:

Grandpa sent me tired memes from 2007.

I don't believe "repost" is what you're looking for (though it is a reasonable single-word, if that's really your priority) because it doesn't necessarily convey age or staleness. In fact repost is often used for very new content that has simply been posted previously, and therefore this post isn't original. Often when one person sees a repost others are seeing for the first time. In that sense repost actually gives grandpa some credit, because perhaps the others on the chain haven't seen what he's sending.

Solution 2:

In the context you have given, it seems like you are looking for repost (Urban Dictionary). This is the label that is often stuck on message boards and such to indicate that something has been re-posted. It can be used as a countable noun, so you could say "consisting of reposts from 2007".