This is the 9879th most frequent German word.
nürnberger
"Nürnberger" refers to something or someone from the city of Nuremberg, Germany; it can also refer to small sausages from the region, known as Nürnberger Rostbratwürste.
Here, 'Nürnberger' is an adjective derived from 'Nürnberg' (Nuremberg), used to describe something related to or belonging to Nuremberg, in this case, its city center.
Die Nürnberger Innenstadt ist bekannt für ihren Weihnachtsmarkt.
The Nuremberg city center is known for its Christmas market.
In this sentence, 'Nürnberger' functions as a noun derived from the same origin, referring to a specific type of small sausage traditionally made in Nuremberg.
Ich esse gerne Nürnberger Würstchen zum Abendessen.
I like to eat Nuremberg sausages for dinner.
Here, 'Nürnberger' again acts as a noun, but this time it denotes a person from Nuremberg.