When you see projects title like "CatDog", "MoneyDog", "DogWifHat", "CatWifHat" etc, its nothing other than to kind of depict a hybrid genetic stunt (as you tagged it), or in other words, create some kind of imagination in the brains of people which possibly people should see or assume as funny.
And you should already know that meme coins is about fun (in it's character) and making money (in it's goal), so this is why we see that memecoins at times, tends to even do better than most good projects in terms of trading volume, people buy and hold major projects as an investment into the future, while most trade memecoins with a goal to make quick money.
I hope this is understandable enough.