Public Relations slang for the tactic of repeating some fake factoid so loudly and so often that many people start to believe it. It is even more effective if public figures and celebrities are used in the echo chamber.

This technique was used for years to debunk those who noted the first signs of climate change.
the echo chamber was used for years by the tabacco industry to deny the health effects of smoking.
by moonbug November 17, 2006
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N. The act of inserting an empty wrapping paper tube into two facing anuses, and then concurrently breaking wind.
Tyler: The wife took a sex class at the learning class and wanted to do an echo chamber

Todd: Did you do it?

Tyler: Yeah, until I shit in the tube.
by Doc Guitar September 3, 2016
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The result of feminists and SJW's threathening, shaming, doxxing, and intimidating people into silence to prevent anyone from questioning and examining the ideology of the movement, further spreading false information and ruining people's lives and reputations.
Person 1: "There was no evidence that she was raped. So there no need to continue with the case."
Feminist/SJW: "IF SHE WAS RAPED, THEN SHE WAS RAPED! YOU RAPE APOLOGIST! FIND THIS GUY'S NAME AND BOOST IT! I DON'T CARE IF THERE'S NO EVIDENCE! HE'S A RAPIST!
Person 2: How is doxxing and threathening this guy going to help? You can't intimidate someone that didn't do anything wrong.
Feminist/SJW: RAPE APOLOGIST! TUMBLR IS GOING TO HEAR THIS!
Person 1: *to person 2* The echo chamber effect is in full force. They won't listen to you. They only listen to people that only have the same views as them.
by ThatCanadianGal July 5, 2015
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