This troublemaking trio from West Belfast writes rhymes in favor of Irish unification, the health benefits of the pint and anything else they can think of. Their politics have earned them enemies among pro-Britain Northern Irish. But their energetic music and on-stage antics have shot them to fame among young people across Northern Ireland, sectarianism aside. They’ve also made an award-winning film. The World’s Gerry Hadden caught their recent show in Boston.