They’re talking about the origin of the band name.

According to Urban Dictionary: Joy Division 

1. A great band.
2. What the Nazis called female prisoners who were kept alive to be prostitutes for the German army.

I love the way people with English accents say ‘nazis’. They pronounce the ‘a’s more, so it sounds like “gnat-sees”. 

Also, the casting director for ‘24 Hour Party People’ sucks though I love Tony Wilson. 

/rant on the Manchester music scene in the late 1970s.