noun
Informal, affectionate term for one's own great-grandfather. The more formal term is 大祖父 (おおおじ).
See also: 大祖父
大じじは今年で九十五歳になる。
My great-grandfather turns ninety-five this year.
子どもの頃、大じじに昔話をよく聞かせてもらった。
When I was a child, my great-grandfather often told me old stories.