What do you think the word "meme" means, and what features does something need to qualify as one?

I'd call it an image macro, but the Venn Diagram of memes and image macros is a 99.9% overlap, so we might as well not draw a distinction.

I've inlined 'meme' to 'iceberg' in the title above so we can hopefully not worry about this.

Yes, but an obscure meme. A maymay, if you will.