So I'm planning to ask my mother to give me a buzzcut the next time she does for my brother, and my father has become increasingly rude about shoving me into the women's department whenever we're out and I plan to call him out on that next time. Both conversations I expect to get to the part where they say, "So why do you want boy's clothing/haircut if it has nothing to do with liking girls?"
And I think I'm at the point where I really don't care if they know, so I'm considering just coming out when it comes to that question. This would be easy with the mother since she has little/no exposure to trans people, and wouldn't really care anyways. However, the father is another matter as he's extremely anti-gay, and has been in denial ever since I told him I was a lesbian way back when. I really don't know how to go about that. Maybe it would be best to wait until he finds me a therapist for my other issues and ask the therapist to back me up, but, how does one answer that kind of question, without coming out?
Saying that haircuts and clothing have nothing to do with gender won't work as he's extremely sexist when it comes to those things. Lately he's taken to grabbing anything pink and telling me I should get it, I refuse and then he interrogates me about what exactly is wrong with getting something pink.

Any help would be appreciated.