This is the 6673rd most frequent Polish word.
dustin
The word "dustin" is not Polish; it appears to be a proper noun or name.
'Dustin' serves as a proper noun, a name of a person, used in subject position.
Dustin odwiedził muzeum w Warszawie.
Dustin visited the museum in Warsaw.
'Dustin' again is used as a proper noun acting as the subject in an interrogative sentence.
Czy Dustin obchodzi swoje urodziny dzisiaj?
Is Dustin celebrating his birthday today?
In this sentence, 'Dustina' (the declined form of 'Dustin') functions as a proper noun in the accusative case, indicating the direct object.