Freddy vs. Jason has a character use a homophobic slur against Freddy. Something like, "What kind of (slur) wears a Christmas sweater". If you read articles, everyone involved in the movie acts like they have no idea how it appeared in the film, the writers claim to have never written it, everyone kind of acts like the actress improvised it and it slipped past the director and editors into the movie.

I suspect everyone involved is lying to cover the fact that they thought it was a good line, but if the actress really did improvise it, that's my vote.