In the post, Ms. Cole, a film producer, said that Mr. Whedon “hid multiple affairs” with “his actresses, co-workers, fans and friends” during their 16-year marriage. His explanation for why he had so many female friends, she said, was that “his mother raised him as a feminist.”

Moreover, Ms. Cole called out his “hypocrisy” for “preaching feminist ideals” while using their marriage as a “shield” to commit adultery. In essence, she branded Mr. Whedon, the director of the coming “Justice League” superhero film, a fake male feminist.

It’s a label that appears to be gaining cultural currency, especially in the Trump era.