Concerned. Memes are in-group signalling one notch above the crudest kind such as football chants, a few notches below the more sophisticated kind like quoting Shakespeare, but all ultimately with the potential to exclude and confuse - which is definitely the opposite of what a technical spec should be trying to do.

I don't see why would this exclude or confuse. It's essentially an in-joke, and shouldn't affect anyone reading the spec who is unaware of the meme.

I'm not a fan, but I don't think we should make it out to be more than it really is.