A popular meme is of what actor, star of 'My Own Private Idaho' and 'Bill And Ted's Excellent Adventure', looking sad while eating a sandwich on a public bench? It's a good way of sarcastically implying something on the internet is disappointing.

The term meme was introduced in 1976 by British evolutionary biologist Richard Dawkins (author of "The God Delusion"). He conceived of memes as the cultural parallel to biological genes and considered them as being in control of their own reproduction.