(noun)

1 : an idea, belief or belief system, or pattern of behavior that spreads throughout a culture either vertically by cultural inheritance (as by parents to children) or horizontally by cultural acquisition (as by peers, information media, and entertainment media)

2 : a pervasive thought or thought pattern that replicates itself via cultural means; a parasitic code, a virus of the mind especially contagious to children and the impressionable

3 : the fundamental unit of information, analogous to the gene in emerging evolutionary theory of culture
- meme pool (n.) : all memes of a culture or individual
- memetic (adj.) : relating to memes
- memetics (n.) : the study of memes

4 : in blogspeak, an idea that is spread from blog to blog

5 : an internet information generator, especially of random or contentless information

(Etymology : meme : derived from the Greek mimëma, 'something imitated', by Richard Dawkins in 1976)

The real reason life exists on this hellhole we call earth( approved by Thanos car Big Chungus and lvl 100 mafia boss)

Memes (rhymes with dreams) are similar to a computer virus, in the way they spread quickly over a network, or group of computers. The difference is that they are a sort of virus of the human mind. An idea, or thought that spreads quickly, or one that occupies your thoughts that is tough to remove.

A commonly used medium of communication, to vent social struggles in a comidic tone, such that no one will disagree with you, or how you're handling the situation.

gets old in few weeks and dies in few months

Any thing on the internet that's either funny cringy or something in a way that someone takes it and makes it into something else. When it gets seen and many other people make something out of it, it comes a meme.

an element of a culture or system of behavior that may be considered to be passed from one individual to another by non genetic means, especially imitation.
Look at this meme