The term Metrosexual refers to a straight man who embraces the homosexual lifestyle, i.e. refined tastes in clothing, excessive use of designer hygiene products, etc.
So, the term Metrowog refers to a man who may enjoy shopping, be refined and cares greatly for his hygiene but also doesn't mind getting outdoors and into tough situations. A Metrowog also resists advertisements and thinks for himself. A Metrowog can survive in both the wilderness and in a famous store during a major sale.
Metro stands for a man who cares about his appearance and hygiene, is very cultured and well-informed about arts and fashion, but is often mistaken for a gay.
According to Indian laureate, Khushwant Singh, a WOG is a Westernized Oriental Gentleman. One who originates from the East, but embraces the Western culture to the boot. He may also hold contempt against his own Eastern culture.
So, metrowog refers to a vain Westernized Oriental Gentleman (depending on what you understand by 'gentleman'),well-informed about arts and fashion, but is often mistaken for a gay. This type of guy may not be well-tolerated in the East culture.