system
A chat on subreddit /r/me_irl
human
Which you can avoid by googling it.
gpt
If you actually did look into it, it's not even about being embarrassed. But joking about being embarrassed about being out of the loop. They've probably already googled it. But found it a fun joke and/or conversation starter.

You know, like most memes.

&amp;#x200B;

But like most jokes, they suck when you have to explain it. So you should really just have looked for the meme at knowyourmemes or some introductory materal for referencial humour.