“It was a running joke; everyone was aware of how ridiculous the rumor mill was, and yet they all shamelessly participated in it.”
“As bland as oatmeal, yet somehow I'd become the rumor mill's hot sauce.”
“the not-so-bookish librarian was half angel, half she-devil, so sayeth the rumor mill.”
“I told my psychiatrist that everyone hates me. He said I was being ridiculous - everyone hasn't met me yet.”
“In fiction, beauty was run-of-the-mill.”
“The gossip mill runs on estrogen.”