So, the overused concept of a meme is itself an overused meme to the point of redefining the common use terminology? Thanks for reiterating my previous statement.

One of the premier traits of the English language is that common use is a prominent defining trait of our vocabulary. It's the reason we have a dictionary definition of "literally" that means "figuratively," for a relevant and recent example pointlessly steeped in contention. That's the hallmark of a living language - and funny pictures and silly captions that are run into the ground so hard that people's grandmother's who don't know a hard drive from a monitor can still identify them as a meme means the common use is just as valid as the legacy definition, and almost explicitly moreso.