Wants you to wear striped skinny Tees, skinny jeans, skinny ties and skinny braces. But only if you're skinny, and can actually fit into their clobber. They generally cater for the younger man and provide discounts to students.
The Oxford Street Flagship store in London is a recklessly huge affair, and carries exclusive designer lines that you can't afford.
A conglomerate of topmen is comparable to looking at the front window of a Top Man retail outlet. Such groups of topmen are often found at drinking establishments frequented by students.
Note: A topman is not to be confused with a metrosexual. A topman does not necessarily have homosexual tendencies.
"It's like being in a topman convention."
person A: "Is that guy a metro?"
person B: "No, he's just a topman."
topman (with an alchoholic beverage in one hand): "Yaaaaaaaaaaaaay!"