You know Osiris? Kind of like that, but it's in Israel instead of Egypt, and there's only one God, who has two different forms, one in heaven but also is a dude down on earth, until eventually it's revealed he has three different forms not just two. Also unlike with Egypt, a significant lack of animal heads, all just like normal human heads. Except the holy spirit who's like a ghost or something. Nailed it.
Wait you don't know Osiris? Crap, let's talk Quetzalcóatl then. So he's like this giant snake with feathers...
Not to mention the trinity isn't even a universally held belief among all Christians, so I would have been right leaving it out too. And it was clearly just a joke comment on a meme community.