This porn video tag consists of four separate elements:
1. Cock: Refers to the male genitalia, specifically the penis. In this context, it is referring to the main focus of the scene involving male masturbation or sex.
2. Cum: Refers to the act of reaching orgasm and ejaculation, often involving release of semen from the male genitals. This element emphasizes that the scene includes climax or ejaculation.
3. Jerk-off: A slang term for self-stimulation or masturbation. In this context, it highlights that the scene showcases manual stimulation of a penis.
4. Off: Generally means "turning something off" or stopping an activity in some cases. However, in this porn video tag, it is not used in this sense and serves as a separator between "jerk-off" and the rest of the phrase.
So, when combined together, this tag refers to a scene involving male masturbation, focusing on the penis, which culminates in ejaculation or orgasm.