There is a post from someone that explains it well, far better than I

Shutting the FUCK up. What did the idiot say this time? I know I will be sorry I asked but what the hell.

I shut M$NBC-BS off last July...ain't been back-I'm Happier....Years ago I left CNN and never watched FOX....I don't believe I've missed a Damned thing of any discernable value. I KNOW I saved myself from hour upon hour upon days upon weeks of "trump-dumps "and other gossipy he said/she said biased nonsense

A Bernie Media Blackout or for that matter.....a Factual NEWS blackout means nothing to people who have already "blacked out" MSM from our homes.

on their Orwellian doublespeak.

and others. I used to do that - but had to quit...my "compost bucket" was overflowing. I may be able to return one day, but for now....Bless you!

But, just out of curiosity, what should he shut up about this time? Context is always nice.

yell it at the TV.