Any interest group with a Web presence generally coalesces around a forum, which is where people can ask questions and others can post answers. Forums are generally divided into topics, and the Q&As are displayed in reverse-chronological order. Here's one I'm familiar with:

As with blogs, older posts fall off the front page. Now and then, the site administrators will decide that a post should not scroll off into history (for example, an FAQ or an announcement post), so they will configure it to be permanently visible at the top:

What's the verb for doing this? Had you asked me, I would have said that you were
pinning the post to the top of the forum.
To pin a post is a common enough term, which derives, obviously, from the idea of pinning something to a bulletin board.
A post thusly pinned is also said to be
sticky. This is another fairly obvious derivation. The dictionaries I have immediately to hand don't list a definition for
sticky that refers to a persistent idea or thought, but that usage is
all over the Web, and certainly got a big boost from the book
Made to Stick.[1]
So. Using the Magic of Language, you can combine the verbiness of
pinning and the adjectiveness of
sticky to come up with a new term. Yes you can, as evidenced in a quote from
an article on
Arstechnica:
I suggest reading our FAQs stickied at the top of the indexing forum to get some ideas of what to do.
There are a surprising number of hits for this term. I get around
370K on Bing,
450K on Google. Here's a great example:
Stickied threads are being unstickied!What's notable, of course, is that the new verb was invented in a roundabout fashion (
to stick ->
sticky ->
to sticky), instead of the plausible usage evolving from simply saying that a post was
stuck in a forum. But the new usage has advantages; saying that a post is
stuck in a forum is ambiguous, whereas saying that the post is
stickied is quite clear.
It's hard to tell whether
to sticky is actually used in any form but the participle; it's tricky to search for
to sticky as a verb, because of the prevalence of phrases like
[lead] to sticky [situations]. If you run across an example of the infinitive or present participle, I'd love to hear about it.
[1] I must say, the cover of that book, which illustrates a piece of duct tape, was brilliant.