This is the 9568th most frequent German word.
moosburger
"Moosburger" is not a standard German word; it could refer to a proper noun, such as a surname or a resident of Moosburg, a town in Germany or Austria.
Here, 'Moosburger' is used as a name for a food item, presumably a type of burger.
Ich habe einen köstlichen Moosburger gegessen.
I ate a delicious Moosburger.
In this sentence, 'Moosburger' refers to an adjective derived from 'Moosburg', indicating something associated with this place, such as residents or items.
Der Moosburger Markt ist am Wochenende sehr belebt.
The Moosburger market is very busy on weekends.
'Moosburger' here identifies a person from or related to Moosburg, forming a noun representing local identity.