( old bats)
If someone refers to an old person, especially an old woman, as an old bat , they think that person is silly, annoying, or unpleasant. ( INFORMAL, OFFENSIVE )
N-COUNT : usu sing [ disapproval ]
OLD BAT
Meaning of OLD BAT in English
Collins COBUILD Advanced Learner's English Dictionary. Английский словарь Коллинз COBUILD для изучающих язык на продвинутом уровне. 2006