Meme's can also be used as an example of iterative design. When Richard Dawkins coined the term meme, he used the metaphor of a virus. A virus is an organism that changes and adapts as it multiplies though out a system. Like a virus, a meme's goes through many versions and grows and changes as it permeates pop culture.s
Often satirical or ironic, and very clever
A smart spin on things
New jokes on the same subject matter
Haven't we seen this one already
Maybe if there's enough irony, people will laugh
The latecomers join in without a map
Maybe we can pull a few more jokes out of this
Its like a greatest hits cd of joke! Also see Remix Culture
if the joke hits TV, it's pretty much over