A rude equivalent to a "TV box" term
Solution 1:
Idiot box or goggle box.
Both terms have been around since the fifties.
Alternatively, brain rotter is nicely descriptive.
Solution 2:
Boob tube is the way to go:
boob tube, noun. Etymology: boob + tube (television); from the notion that television programming is foolish or is viewed by foolish people : TELEVISION ; especially : a television set
Boob tube also enjoys wider currency than idiot box, at least according to this Ngram:
Solution 3:
I rather like "glass teat", although it's not as popular as the others.
Solution 4:
The opium of the people? ;)