Television. Another word for T.V. Basically refers to the tendency of idiots to watch stupid shows, and the tube part refers to the "cathode-ray tube" display technology used in many current and older type television sets.
Well, it looks like he's nerding out on the idiot tube.
Fingernailpiss!The idiot tube is broken!
Then I totally zoned out on the idiot tube for the rest of the night.