Tgirl on Girl refers to a lesbian or female-on-female pornographic scene involving one or more transgender women, typically with feminine physical features and genitals. In this context, "tgirl" is an abbreviation for "transgender girl." The term "ontgirl" means "with/on a girl," indicating the interaction between the tgirl(s) and another female partner in a sexual or sensual context. This tag is used to describe adult videos that feature transgender women engaging in intimate, erotic acts with other women.