1. a sex hormone that makes guys care more about there looks and feelings of others. metrogen gives them a metrosexaul out look on while the metrogen present in the body.
Guy: your boyfriends a total queer
Girl: Hes not gay! he just has a little metrogen in him
When someone, mainly a guy, is in tune with current affairs, style trends, fashion and his feelings but isn't quite considered a full fledged metro-sexual.