noun
old people; the elderly
Casual, somewhat blunt term for old people in general. Often used in informal conversation; can sound dismissive depending on context.
この辺はじじばばばかりで、若い人が少ない。
This area is full of old people, with few young folks.
じじばばに
It's only natural to give up your seat for the elderly.
noun
grandparents
Only when written 祖父祖母
Specifically refers to one's own grandparents or grandparents in general. The kanji form 祖父祖母 is rare and mainly used in written contexts.
夏休みはじじばばの家に遊びに行く。
I'm going to visit my grandparents' house during summer vacation.
じじばばからお年玉をもらった。
I received New Year's money from my grandparents.
Kanji spelling for 'grandparents'; rare and restricted to the grandparents sense.
Reduplication of じじ (old man) and ばば (old woman), both of which are informal, somewhat blunt terms. The exact origin is uncertain, but it likely arose as a colloquial compound.