This porn video tag, "tgir-sucks-cock," refers to a scene involving a transgender woman (often abbreviated as "TGIR" or "trans woman") performing oral sex on a man. In this context, "TGIR" represents a person who was assigned male at birth but identifies and presents as a woman. The term "sucks cock" is a common descriptor for oral sex performed on a man's penis. This tag indicates that the video contains explicit content of a transgender woman engaging in this sexual act with a man.