A meme can be many things 1. A retarded inside joke on the Internet. These usually spew out of Vine or 4chan and are regurgitated by 10 year olds simply for the sake of saying them-- these don't really have any applications to real-life situations, and thus, can be used in [i]any[/i] situation. (For example, "deez nuts" is a meme that started with some guy shouting "deez nuts" into a phone. Because "deez nuts" literally has no meaning, it can be applied to virtually any situation.) 2. An image with a caption in large bold letters. These are usually references to movies or games that can be used to express outside situations and ideas. Funny memes, in this sense, usually hold some truth. (For example, "one does not simply" is a reference to the [i]Fellowship of the Ring,[/i] in which Boromir explains something that seems possible but is much more difficult in practice. The actual quote is "one does not simply walk into Mordor." It can turned into a meme by modifying the quote, like so: "one does not simply win an argument with their mom." )