While we're at it, what's BTTT stand for? :\
That's a lazy bump
BTTT (or bttt) is an abreviation for "bump to the top".
And "bump to the top" just means that you want a certain thread to get seen, so when you "bump", or "bttt", that thread title reappears at the top of the "latest posts" page for freepers just logging on or refreshing their "latest posts" page. For example, right after I click "post" to post this post, if I quickly refresh my "latest posts" page, this post will likely be at the top of the page, or at least near the top of the page, depending on how many other people click "post" to post their posts at or about the same exact moment that I click "post" to post my post.
Got that?