The tag "gaycumshot" refers to a specific category in the adult content industry. It is composed of two main elements: 'gay' and 'cumshot'. 'Gay' indicates that the video involves male-male sexual activity, while 'cumshot' specifies that the focus or climax of the scene is the ejaculation (cum) of one or both participants. In essence, this tag describes a pornographic video featuring two men engaging in sexual activities leading to one or both partners reaching orgasm and ejaculating.