vox populi (VOKS POP-yuh-ly) noun
Popular opinion; general sentiment.
[From Latin, literally "voice of the people."]
"Dedman's piece got barely a whisper from the vox populi. 'We received just one e-mail, but no one complained,' said Globe Ombudsman Christine Chinlund."
--Allan Wolper; The Credibility Gap; Editor & Publisher (New York); Aug 12, 2002.
Related expressions are
1) "Vox populi vox Dei" meaning the voice of the people is the voice of God. It refers to the idea that the kingor the government ought to pay attention to the voice of the people. Vox populi vox Dei certainly works when it comes to the growth of alanguage.
2) "Vox clamantis in deserto," a voice crying out in the wilderness. It is the motto of Dartmouth College and originally referred to John the Baptist in Judea and Galilee.