1. You might be saying it wrong (I know I was). I was pronouncing it like it "men" with an m at the end, when really the word rhymes with cream. Strike one.
2. Thanks to Wikipedia, I now know the word originates from evolutionary theories. "The British scientist Richard Dawkins coined the word "meme" in The Selfish Gene (1976) as a concept for discussion of evolutionary principles in explaining the spread of ideas and cultural phenomena. Examples of memes given in the book included melodies, catch-phrases, beliefs (notably religious beliefs), clothing fashion, and the technology of building arches."
3. "Internet meme" is more narrowly described (again, by Wikipedia) as follows: "At its most basic, an Internet meme is simply the propagation of a digital file or hyperlink from one person to others using methods available through the Internet (for example, email, blogs, social networking sites, instant messaging, etc.). The content often consists of a saying or joke, a rumor, an altered or original image, a complete website, a video clip or animation, or an offbeat news story, among many other possibilities. In simple terms, an Internet meme is an inside joke, that a large number of Internet users are in on."
Turns out, everything I ever needed to know (and more), I can learn from Wikipedia. Now that we all know, maybe next week I'll actually get around to participating in a meme. (Which I will probably always pronounce wrong in my head.)