When one is skyping with another user and one or both members of the conversation are exploring their bodies sexually aka two people watching each other masterbate via video and getting off to it.
Dan chooses youporn when he wants to get off. Nora instead skyperbates when she wants to fling her bean.
A skyperbater is usually a perverted loser who stalks and calls unwitting people on skype and pleasures themselves to the victim on webcam. Sometimes skyperbaters are old broke washed up men who live on islands with horse faced women. They also occasionally use hair dye and sunglasses to disguise how hideous they look. Please avoid these bottom feeders at all costs.
Hey watch out for that freak Hank he is a skyperbater who hangs out at the skype and wipe.