Protein everything refers to the trend of high-protein versions of every food (protein pancakes, protein donuts, protein ice cream). Not concerning, generally safe; balance is key. If your kid uses it constantly, ask them where they first heard it, not to police their speech but to understand which online community they are in. Most slang of this kind moves through TikTok and group chats, so seeing it in your child's vocabulary just means they are plugged into normal teen internet culture.