old bat
英 [ˌəʊld ˈbæt]
美 [ˌoʊld ˈbæt]
n. 愚蠢的老人; 傻老帽儿
牛津词典
noun
- 愚蠢的老人；傻老帽儿
a silly or annoying old person
柯林斯词典
- 老疯子；讨厌的老家伙；（尤指）癫婆子，招嫌的老太婆
If someone refers to an old person, especially an old woman, as anold bat, they think that person is silly, annoying, or unpleasant.