A specific demographic group, those aged 20-29. Often Obama supporters (regardless of the country they live in), heavy drinkers, users of
urbandictionary.com (and the souce of all the worthwhile-to-read definitions, as opposed to the adolescents that write the unfunny definitions that either profess their
love for a gf/bf or proclaim their hatred of a schoolmate), students, servers, bartenders, clubgoers, in massive debt yet still optimistic, and believe that they can change the world if they just
work together (until they reach the threshold age of 30, when 98% people realize the futility of their causes).
The author of this
UD definition belongs to twenty-somethings demographic.
The courageous protesters at Tiananmen
Square were mostly twenty-somethings.