This is the 11558th most frequent German word.
stieber
"Stieber" is not a standard German word; it might be a proper noun or a misspelling.
Here, 'Stieber' is used metaphorically to refer to someone acting like a spy or investigator.
Er benahm sich wie ein Stieber.
He behaved like a spy.
'Stieber' functions as a noun, meaning a spy or someone involved in espionage activities.
Die Geschichte über den Stieber war spannend.
The story about the spy was exciting.
The term 'Stieber' is used in a historical or fictional context, describing an individual performing covert surveillance.