YES, it's true : Fijian men wear skirts

Long time ago, the traditional attire was loin cloths for men and grass skirts for women. Skirts were short for single women, and long for married women, with girls wearing virgin locks before marriage. Most had the lower parts of their bodies decorated with tattoos.
Modern Fiji's national dress is the sulu, which resembles a skirt. It is commonly worn by both men and women and it's usually plain grey, blue or brown but... everthing in Fiji could also be "bula" (= with flowers) as in the picture.

Many men, especially in urban areas, wear Sulu and can be tailored as part of their suit. Many will wear a shirt with a western-style collar, tie, and jacket, with a matching Sulu va taga and sandals, this type of sulu can be worn to a semi formal or formal occasion. Even the military uniforms have incorporated the Sulu va taga as part of their ceremonial dress.