meme

/miːm/

noun

1. A unit of cultural information, such as a cultural practice or idea, that is transmitted verbally or by repeated action from one mind to another.
2. A self-propagating unit of cultural evolution having a resemblance to the gene by (the unit of genetics).
3. A thought, idea, joke, or concept that spreads online, often virally. Can be in the form of an image, a video, an email, an animation, or music.
4. 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).