For what is worth it, I learned that term in this song, from the trans fem artists "Irmãs de pau"; where they sing about getting tired of boyfriends that don't present them publicly and don't accept themselves as having a transfem girlfriend, but then they got themselves a boyfriend that ir a real man and as a plus he have a "boyceta". They also throw terms as "cuceta", from "cu" that is ass and "buceta".