rumour mill
noun [ S ] UK (US rumor mill) uk/ˈruː.mə ˌmɪl/ us/ˈruː.mɚ ˌmɪl/
谣言工厂
a situation in which a number of people spread rumours about something
Recently the rumour mill went into overdrive with suggestions that the couple might split. 最近谣言工厂大为活跃，说他们俩也许要分手。