A meme is an idea or behavior that spreads through a culture.

Wack, the definition I have here is

"Any unit of (originally cultural) information, such as a practice or idea, that is transmitted verbally or by repeated action from one mind to another in a comparable way to the transmission of genes."

Of course there are some other definitions, but I'd assume this community intends the most open interpretation otherwise they'd have a more specific one listed in the comm rules

It most certainly can be.