I agree that threadsuck has a problem in that it's not intuitive, whereas "download" is. But then, I still have no clue what "meara" means when used as a verb.
Goodness. Do mine eyes deceive me, or is there no mention of a meara in the FAQ?
Lyra, a meara (so called after the meara, because of her habit of mearaing, and in recognition of some of her prodigious mearas of yore, and hopefully the rest of this explanation will allow you to map all that back onto English) is a catch-up post containing multiple responses to previous posts. So, for instance, if you come back to the Natter thread to find 300 posts have been made in your absence, you go through them all and have responses to six of them, and you put them all into the same post - that post's a meara. And an accomplishment, which is why they deserve their own brand name.