What Meme Is
This term is using when you want to describe something that spreads swiftly via the Internet. Meme is a cultural unit (an idea or value or pattern of behavior) that is passed from one person to another by non-genetic means (as by imitation); “memes are the cultural counterpart of genes”. So any unit of cultural information, such as a practice or idea, that is transmitted verbally or by repeated action from one mind to another can be called as Meme.
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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.