>>47221990You can easily find the answer on the internet friend, but I'll explain it to you
"Chuuni" is a word that originated on japan, chuunibyou ", which roughly means " second year of middle school sickness". It's an adjective for describing teenagers who try to act cool by being super mature or different, or dark and edgy, but fail miserably because they're still thirteen, like kids who wear eyepatches because they want to be just like that guy from tokyo ghoul, or kids that sit weird because they want to be just like L from Death Note, Lucario is the type of pokemon those kids love
pic related is a example of a chuuni girl