I think I'm about to explain what your asking about, LOL.
In blogging, anyway, a meme is when you write a post - usually with a question of some sort - and specifically call out on other people to answer it. Almost like some of the email chain things, but not really :P
With a lot of the blog software if you link to someone else's blog, they get notified... so they know that you "called" on them to respond to your post! I've been called on to respond to a meme post once (and then of course called out a few other names in my response post) - it was a lot of fun! :)
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Toxic Free Blog - by Brittany Glynn
Brittany is a director of the Toxic Free Foundation and created the first ever Toxic Free Certification Program. Weekly, Brittany publishes the Toxic Free Blog and provides coaching to over 10,000 families in the United States alone. She is the author of a Toxic Free educational series and co-author of several Toxic Free learning programs. Brittany is also an award winning author.