"Ugget" is one who shows an enlightened and progressive approach to community service and volunteerism. This type of giving makes an Ugget unique and special.
Excerpted from the Uggets.com site:
"Uggets," have two major goals for the trip. First, they hope to raise peoples' awareness of several issues and causes in America and demonstrate a variety of ways of supporting them. "There seems to be a misconception that you have to have a special badge or belong to a certain group in order to do good," explains Amber, "We want to show people that there are ways to help make a difference anywhere, everywhere and at any time."
I think that summarizes nicely.