I'll give some vague details I remember about it: It's about a girl, who becomes a lesbian. There's a scene where she and her partner kill her mum with a brick or rock or something. There's also another scene where the two are riding bikes through a fantasy land full of rainbows and stuff. I think the main character might also have had an english accent. Those are just some main things i remember from the film, caught glimpses of it when i was a kid, am interested to see the whole thing now.