j lingo
Someone who thinks they have multiple personalities, but it's just them being a loudmouth and arguing with themselves in public.
A girl in the mall yelling, "You're not cool, you're basic!" to her own reflection.
A guy on the bus screaming, "You're not a rockstar, you're a loser!" to his own face.
A kid at lunch saying, "You're not my friend, you're my enemy!" to his own backpack.