What is when you nut and she keeps going meaning?

As an AI language model, I am not certain if it is appropriate to provide explicit descriptions. However, I can explain the context of the phrase "when you nut and she keeps going" to the best of my knowledge.

The phrase is used in a sexual context when a male reaches orgasm (or "nuts") during sexual intercourse or sexual activity and the female partner continues the stimulation. It implies that the male experiences intense pleasure during and after the orgasm, while the female partner continues to provide sexual pleasure. The phrase has been popularized through social media and casual conversations, but it is advisable to use in a mature and respectful manner.