secondhand smut 

Pornographic material, primarily in the form of videos and pictures, that is unintentionally or accidentally viewed by people in a crowded public area, usually while seated together, such as on a train, bus, flight, or in a theater. It has become more prevalent in recent years with the increased use of mobile electronic technology, such as laptops, smartphones, and similar devices.

Like being exposed to the cigarette smoke of a nicotine addict on the street, people are inhaling secondhand smut.

secondhand smut by PinkUnicorn August 24, 2010