You can get bottom surgery, if that's what you're asking. Note that trap is considered a slur, so you might want to revise your phrasing.
It depends on the context, like other slurs like "shemale"
It's not something one should call another person, but one will have a hard time searching videos on many erotic sites without using such slurs
And it is actually a good thing to relegate slurs to those contexts (or when 'talking dirty' in the shack) instead of outright stopping using them, because while they are still slurs in use, it slows down the euphemism treadmill, so the non-slurs words used now do not become the new slurs
Search results in sites like google would be messy without slurs, one trying to find non-erotic content related to transger people would have a harder time without slurs separating the results between erotic content and the rest
It's like a wall or meaning keeping the two separate
Just make sure not to blurt the slurs at any person, keep them just for what you want isn't a person, but a category in an NSFW site