The porn video tag "shemale-daughter" refers to a specific type of adult content involving a transgender or gender non-conforming individual in a role traditionally associated with a daughter. In this context, the term "shemale" is used as a slang for someone who identifies as a trans woman or has both male and female characteristics, often including those with male genitalia. The video may involve sexual acts between this shemale character and other individuals, typically males. This tag is meant to signify that the content features a gender non-conforming individual in a role usually associated with daughters for the purpose of adult entertainment and fantasy.