The type of upper class english youth who talks with an affected accent, knows people who know people who know prince harry (and call him 'hazza'), who calls his mother 'mummy' even at the age of 23 and wears polo shirts and rugby shirts with the collars popped. So called because of the fact that when a ra ra laughs it sounds like they're shouting 'ra ra ra' to each other. Usually nice enough, if a bit pretentious. May have a swimming pool and a tendency to wear bright pink shirts. Might look gay, but usually just metrosexual.
Synonyms: ra boy, hooray henry
"I was at durham university the other day, and it's filled with ra ras there'
'is he gay?' 'no, metro. He's a real ra ra'