The phrase "transgirl-cum" refers to a scene or content involving a transgender woman (often referred to as a "trans girl") who reaches sexual climax or "cums". This tag is specifically used in the context of adult content and indicates that the video features a trans woman engaging in sexual activities leading to her orgasm. This may include masturbation, oral sex, penetrative sex, or other acts that lead to her climax. The term is intended for an adult audience who are familiar with pornography terminology and concepts.