What the hell does metrosexual mean?

Jon said he had hairplugs put in at the sides up his ears, he didnt have bald patches just slight thinning. He said so what loads of people have it done. Becky said it was in British press, but I thought I remembered seeing it in an intereview in the past 2 years. Cant be sure , dont exactly hang on every word the guy says and when he says it .

Dawn