This is the 2082nd most frequent Polish word.
największego
The Polish word "największego" means "the biggest" or "the greatest" (genitive singular form).
Used as the singular genitive adjective form to describe a noun.
To jest mieszkanie największego w mieście.
This is the apartment of the largest in the city.
Used as the singular genitive masculine adjective to describe 'fana'.
Spotkałem na ulicy największego fana tego zespołu.
I met on the street the biggest fan of this band.
Used as a genitive adjective for the noun it modifies.