おばあちゃん子
Meanings
1
child who loves their grandmother; grandma's child
Describes a child who is particularly attached to their grandmother, often preferring her company.
My daughter is a total grandma's child; she always wants to go to her grandmother's house on weekends.
2
child doted on by their grandmother; grandmother's darling
Focuses on the grandmother's side: a child who receives special affection and pampering from their grandmother.
He's doted on by his grandmother and always gets pocket money from her.