Noun. The act of avoiding the use of forms of social media or other technological means of communication, especially the internet and television. This can be done for various reasons, such as not wanting to a spoil a movie one has not yet seen, reveal the score of a sporting event, or be aware of news events that one feels are best not known about.
The sheer amount of "this person got shot and this guy sent pictures of himself naked online" on my local news caused me to go into a media blackout for a few days.
When a man or woman chooses to ignore all phone calls, texts, emails, etc. from a romantically interested individual as a mechanism for rejection.
Chris: How are things going with that girl you met?
Tim: Total media blackout. She won't return a single phone call or text message.