The term "sissytranny" is a combination of two terms: "Sissy" and "Tranny". In the context of adult content, these words have specific meanings.
"Sissy" refers to a man who is dressed or behaves in a way that is stereotypically feminine. This can include wearing makeup, clothing typically worn by women, and engaging in submissive behavior.
"Tranny," short for "transsexual," is a term used to describe someone who has undergone or is undergoing the process of transitioning from male to female (MtF) or vice versa (FtM). This often includes hormone therapy and various surgical procedures.
So, when you see the tag "sissytranny," it typically refers to content that involves a man dressed in feminine clothing and engaging in submissive behavior who is also transgender. This can include scenes where the individual may wear lingerie or other female-specific attire, perform sexual acts, or be engaged in BDSM play while in this role.