Before memes become fully-fledged memes they are protomemes. The definition of a meme involves social sharing - but before memes can be shared they must first be created - and often the creation takes place in a single mind. When a meme is under construction it is called a protomeme.
Protomemes are usually part of what I have called intracranial memetics - the area of memetics that deals with memes when they are inside human brains.
As far as I know, the term "protomeme" was first used by Liane Gabora in 1997.
- Gabora, Liane M. (1997) The Origin and Evolution of Culture and Creativity - Journal of Memetics: Evolutionary Models of Information Transmission, 1(1).