These are various memes which eventually became sth like a subculture, mainly on tiktok. It encompasses for example Cupcakke remixes, jiafei and many other stuff. It’s also connected to expressive language, words like “slay”, “ate”, purple heart core (💜), and usage of sparkles (✨) and painted nails (💅) emojis. Flops oppose the so-called “Daboyz” which encompasses modern culture of young manosphere, fascist teens, geotubers, and gen alpha. The traits of Daboyz is the usage of incel slang like “alpha/sigma” and gen alpha slang like “skibidi ohio gyatt”, as well as characteristic emojis (💀, ☕). This, this and this video can be helpful to get it.