maajibon - A word that means 'you' but your grandma uses it like it's a

A word that means 'you' but your grandma uses it like it's a secret code only you two know.

My maajibon called me and said, 'Maajibon, I'm coming over to yell at you.'

She texted me: 'Maajibon, you're still a mess.'

She used it in a tweet: 'Maajibon, I'm proud of you, even if you're still a mess.'