No. Facial Overbreadth is a legal term saying that a law is too broad and restricts protected speech unreasonably.
A party may bring a facial challenge for an allegedly overbroad statute. A statute or restriction is overbroad if its reach exceeds its scope. In other words, it regulates more speech than intended or permitted by the Constitution.
Laws that are overbroad and extend their reach to protected speech will generally be invalidated in their entirety.
Is “facially overbroad” supposed to be some sort of anti-transfem slur?
No. Facial Overbreadth is a legal term saying that a law is too broad and restricts protected speech unreasonably.