Topshop is the popular highstreet shop which provides the uniform for the entire female populace of the UK aged between 17-21.
The vast majority of these females congregate on university campuses, often bemusing passers by with the ability to blend in with one another and become just as indistinguishable as the person next to them.
Occasionally, large groups of identical females can be seen trawling the highstreet in the evenings in hunt of a male to satisfy their tragically low self-esteem and reassure their superficial personna. These groups are known as "Topshop Brigades". Approach with caution, or lots of money and pseudo-compliments.
Person 1: Dude, with a gene pool full of identical human beings, the human race is fucked!
Person 2: Relax! These people are all genetically different, they just happen to look the same. Although you are correct, with another generation of superficial and fake individuals to look forward to, we are indeed fucked :(.
Person 1: Wow, it's my lucky night man! I just scored with two identical twins!
Person 2: Caution! That's the topshop army you're messing with!
Person 1: Oh man, how could I have been so blind? I'm going to go home and cut off my genitals so I never make that mistake again!
Topshop girl 1: Hey, have you seen my new outfit?
Topshop girl 2: Hey! I have one just like it!
Normal individual: Hey ladies, have you seen these new grenade shaped purses?