Originally, meme was defined as the counterpart of the gene. From Wikipedia: "In the popular science book The Selfish Gene, published in 1976, the English term meme was coined by Richard Dawkins to describe the dissemination of cultural information, but in the course of the digital revolution it was used to describe a specific type of internet phenomenon.” Thus, today a meme is a photo of Kim Kardesian’s fat ar$e with a stupid text, not a philosophical concept. This inflation of an important idea is symptomatic for the degeneration of humanity.
It literally still works under the original usage with how it is commonly used today. Under Dawkins’ original definition, the only thing humans do that isn’t a meme is having kids. It’s any non-genetic information that is shared.