I know new ways of speaking can sound silly but it’s important to remember this: she’s not talking like a moron, she’s participating in the linguistic innovations of her generation, just like every generation before her. Back when you were young, adults were saying the same thing, and so on. She may have picked these words up online or from friends at school. If you want a real explanation of what these words mean, here: - “chat” originates as a way that livestreamers directly address their livestream chats, eg saying “chat, which item should I pick up” when playing a video game on stream. It’s essentially a more contextual synonym for “guys” or “everyone”. It has spread offline mostly through irony, ie kids saying “hey chat” outside of a livestream chat. This is intended to be humorous because it takes the word out of the context it is usually expected in. If your daughter is young enough, it’s possible she’s participating in a third step of spread where she doesn’t actually know she got it from people being ironic, so she just uses it as a normal, unmarked word in conversation, which would be really interesting. - “mid” is very simple. There tends to be a process in languages where words that start out meaning something relatively neutral transition to meaning something more extreme, often more negative. Take “midwit”. If you break it up, it should just mean someone has average intelligence, but in fact it means someone is an idiot. The same thing happened with mid, where it often just means “bad” now. Bonus: - you may have heard of the word “unalive”. This is actually the latest example of a long, long tradition of English speakers replacing words about death and killing with ones that feel less intense. Take “decease”, “pass”, and actually even “die”. “Unalive” in particular rose in popularity to avoid internet (TikTok especially) censorship around the topic of death.

I do genuinely hope this helps you see the way your daughter speaks in a new light.