kaisoni
A kaisoni is a girl who's got a cool vibe but will cuss you out for no reason. She's the kind of friend who'll save your life, but also steal your lunch money.
She said, 'You're the worst,' and then laughed in my face.
She took my lunch money and said, 'You're not even hungry enough to deserve it.'
She saved me from the bullies, then said, 'You're still the worst.'