"A hidden Ben is where one person engages in sexual intercourse with a girl while a friend hides in a closet masturbating. When the friend in the closet is about to cum, he runs out and gives the girl a facial. The term originated from the hit TV show Just Ben."
Person 1: Yo man, Ryan was fucking some girl, and then Ben jumped outta the closet and gave her a Hidden Ben
Person 2: Shit!