Pig Latin is a silly way of talking where you take the first letter of a word and put it at the end, then add "ay" to the end. For example, if we have the word "pig", we would take the "p" and put it at the end, then add "ay". So "pig" in Pig Latin is "igpay". Another example would be the word "banana", which would turn into "ananabay".
It's like a secret code that only you and your friends can understand! You can talk in Pig Latin and no one else will be able to figure out what you're saying. But don't worry, it's just a game and not a real language.