Dewsbury Tracksuit
Worn by girls who go out in their pyjamas to Tesco, corner shop for fags etc. Usually Primark pyjamas. Can also include indoor-based booties.

Coined during the case of Shannon Matthews, when many unemployed locals of the Dewsbury estate were filmed outside in their pyjamas regularly.
To my horror whilst shopping in Waitrose, I saw one of those awful benefit types pushing a trolley around and wearing a Dewsbury Tracksuit.