A pop star is person who is widely recognized or famous in the music industry and who commands a moderate or high degree of public and media attention.
An unexpected arrival. So named, because of the startled look of the average porn starlet when the money shot hits them in the face.
Lady Clematislooked up at Lord D'Cockworthy with a look of total surprise for he had just delivered a porn stars pop shot right between her emerald eyes.