noun. A meme is considered to be a discrete idea that replicates itself, with the connotation that memes replicate themselves and are propagated by people through social and technological networks, much like both real and computer viruses.
(Coined by Richard Dawkins)
Usage: “The sarcastic meme of ‘Our friends, the Saudis’ continues to spread across the Intenet”
Note: Although not strictly speaking a ‘blog specific’ term, meme is very widely used in the Blogosphere (qv).
Also see: Meme hack, Meme war