noun · respectful form of address for a married woman used by members of her parents' family

听说咱家的姑奶奶今天要带着孩子回娘家过节。

noun · paternal great-aunt (father's father's sister)

我的姑奶奶今年九十多岁了，身体还很硬朗。

noun · brassy self-reference used by a woman in an altercation; I; me

姑奶奶我今天心情不好，你最好少惹我！

noun · colloquial form of address for an unmarried girl or woman, expressing affection or reproach

我的小姑奶奶，你可千万别再给我惹麻烦了。