Pumpy

A puffer jacket that is particularly large or over-sized. The coat's exterior is comprised of a number of puffy sections that are separated by seams and are filled with down or a synthetic material that is intended to provide warmth to the wearer. It is particularly seen to be worn in parts of outer London.

David Beckham: You see my new pumpy bro?
Simon Cowell: That's a big ting brudda.