A world cuposer is someone who acts as if they know all about soccer (usually around the time of world cup) when in reality, they know little to nothing about the sport. Hardly even watching the world cup let alone the sport itself, they get all the info they need to on social networking sites such as Twitter and Facebook.
They'll also usually only be found talking about "big" teams such as Germany, Brazil, and Argentina and famous players such as Cristiano Ronaldo, Lionel Messi, and Neymar.
World cuposer: Did you see that Mexico vs Brazil game the other week? Ochoa was a brick wall!
Soccer fan: Did YOU see the game?
World cuposer: Well... no but --
Soccer fan: Do you even know his first name?
World cuposer: ...