A device used to watch videos or listen to music on a city bus for the sole purpose of ignoring hobos.
Hobo: hey mister, you got any change or want to talk about nothing in particular while my eye wanders and i smell funny?
You: (dont notice because you are blasting white noise and staring at a 3 inch screen)
Hobo: you make me cry inside
You: (still dont notice)
Hobo: (walks away and bothers another poor soul without an ipod)