The porn video tag "gay-small-cock" is a combination of three terms:
1. Gay: This term refers to sexual activity or content involving individuals of the same gender, typically men in this context.
2. Small Cock: This term denotes that the focus of the video is on scenes featuring male performers with smaller than average penis sizes.
Together, "gay-small-cock" describes a specific niche within the adult entertainment industry that caters to viewers who are interested in seeing gay sexual content specifically featuring men with small penises.