That really annoying phrase repeated in high-pitched tones; derived from that used-to-be-hilarious-but-is-just-getting-old-now video on YouTube. aka Charlie the Unicorn.
"Shun the non-believer, shunnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn-nuh"
by WhoWhatWhereWhenWhyBitches March 20, 2009
Usually a pejoartive, insulting term for someone who shares different religious views to that of the person using the word.
"I don't know if you can trust non-believers."
by The Brookester January 26, 2009