This porn video tag describes a specific type of adult content involving gay male participants. Here's the breakdown:
1. "Gay": The content features male-on-male sexual activity.
2. "Blowjob": One or more performers engage in oral sex, specifically by performing fellatio (oral stimulation of a male partner's penis).
3. "Cum": The climax of the video usually involves one or both partners reaching orgasm and ejaculating semen.
4. "(gay)": This is an additional tag to emphasize that this content is specifically focused on gay sexual activity.
So, this tag is indicating a gay male porn video featuring oral sex acts (blowjobs) leading to one or both performers reaching orgasm and ejaculating.