Cumshot

The focus here is on Blow Job’s seeming deviations from one of hard-core pornography's staples, the cum shot or money shot--that is, the ejaculation outside the sex partner's body as visual proof for the camera that male satisfaction has been achieved.

Source: wiktionary

The cum shot forms hardcore's pinnacle. It depicts ejaculation in close-up, always occurring outside the body of the sexual partner.

Source: wiktionary

I began by specifying the conventions of the cum shot. In feature porn, ejaculation achieves its prominence under several precise conditions. [...] The first simply demands that ejaculation be visible. It is shown in the closest of possible close-ups. As the camera zooms in, the male performer withdraws from the body of his co-star, proceeds to masturbate, and ejaculates over his or her face, chest, belly, back or buttocks.

Source: wiktionary