whatshername
noun [ S ] informal (mainly UK whatsername ); (US whats-her-name) uk/ˈwɒts.ə.neɪm/ us/ˈwɑːts.ɚ.neɪm/ (also whatsherface, whats-her-face)
名叫某某的她，某个她（用于忘记女子的名字时）
used for referring to a woman or girl when you cannot remember or do not know her name
I gave the report to whatshername - the new marketing assistant. 我把报告交给了那个叫什么名字的她——新的市场助理。