noun
Informal or slightly derogatory term for an elderly woman; can be used affectionately or pejoratively depending on context. Usually written in kana.
あのばばはいつも公園で猫に餌をやっている。
That old woman always feeds the cats in the park.
noun
In the card game 'old maid' (ババ抜き), the joker card that players try to avoid. Often written in katakana.
See also: ババ抜き
ババ抜きで最後にババを持っていた人が負けだ。
In Old Maid, the person left holding the joker loses.
Derived from a reduplication of 婆 (ば), an old woman. The card game sense comes from the game 'old maid' where the losing card is called ババ.