What is the website with the crazy Mexican kids grinding on each other?

It sounds like you're referring to a viral video or meme that features young people dancing in a lively or humorous manner, often shared on social media platforms. These types of videos can originate from various sources, including TikTok, YouTube, or specific meme sites. If you're looking for a specific video or website, please provide more details, and I might be able to help further!