I don't like the term either, which is why I put it in quotes. But what I was describing does happen and it does sometimes lead to rape accusations. This happened with a female friend of mine in college who, under pressure from her roommates to tell them what had happened with her boyfriend yesterday that left her so depressed, burst into tears and managed to get out that he'd "made me have sex with him," at which they talked her into reporting it, which she was very reluctant to do. But by the evening of the same day, she was in tears again and telling them she needed to go back to the police, that she should never have reported it, that that wasn't really what had happened, it was just that the two of them had been arguing a lot the day before and when they went out at night, "I wanted to have sex, but then I didn't" but made a decision to go along with it anyway. She had never, *by her own admission*--at least by that point--in any way indicated to him that she was unwilling, though perfectly capable of having done so at the time.
So, what do you call something like that? I don't see it as a "false accusation", to me that suggests a conscious fabrication. I think she was under a lot of stress and felt used and angry (at herself as well as the boyfriend) that he'd been insensitive enough to think getting a little buzzed and having sex would be an OK way to follow up a day filled with some pretty intense arguments, then when her roommates started well-intentionedly pressuring her it was kind of like a dam bursting and for a brief time she literally believed what they were able to get out of what little she said. Unfortunately she hadn't fully thought through and confronted her own confused feelings about the whole situation yet. This kind of thing happens. Her case was not unique.