What is "blockleiter"

Blockleiter (, derived from city block) from 1933 was the title of a lower Nazi Party political rank responsible for the political supervision of a neighborhood. Referred to in common parlance as Blockwart (Block Warden), the officials were in charge to form the link between the Nazi authorities and the general population. Up to today, the derogatory term Blockwart ("snoop") has survived in German colloquial language.