This porn video tag consists of two parts: "skinny" and "gay".
1. Skinny: Refers to the body type or physique of the participants involved in the scene, indicating that they are slim, lean, or thin. This could be a preference for some viewers who enjoy watching individuals with a slender build.
2. Gay: Specifies the sexual orientation of the performers involved, as they are engaging in sexual activities with someone of the same gender (male-on-male). This tag is used to cater to the audience interested in this specific type of content featuring gay men.
In summary, "skinny-gay" refers to a porn video featuring slim or lean male performers engaging in sexual acts with each other.