Here's the top entry as of this date for the phrase "Human Microphone" from http://www.urbandictionary.com/define.php?term=Human%20Microphone&defid=6130688


October 19, 2011 Urban Word of the Day

A tactic protesters can use to circumvent police bans on electronic amplification of speech. One person starts to speak to a large crowd. After a short sentence, everyone within hearing distance repeats whatever was said at the top of their lungs, allowing people outside of hearing distance to hear the speech.

The Human Microphone on Wall Street announced this speech:

"Mic Check."

"MIC CHECK!!"

"The human microphone is slow and cumbersome"

"THE HUMAN MICROPHONE IS SLOW AND CUMBERSOME!!"

"but it really makes you think through"

"BUT IT REALLY MAKES YOU THINK THROUGH"

"what it is you want"

"WHAT IT IS YOU WANT!!"

"to say."

"TO SAY!!"

by Occupy Urban Dictionary Oct 10, 2011