1.
meme; internet meme
A piece of media — typically an image, video, or phrase — that spreads rapidly online, often with humorous variations. Borrowed from English 'meme,' originally coined by Richard Dawkins.
Usage
ミーム is used primarily to refer to internet memes — humorous images, videos, or text that spread virally online. The original academic sense (a unit of cultural transmission, from Richard Dawkins' 1976 book) is less commonly encountered in everyday Japanese.