Szmalcownik (); in English, also sometimes spelled shmaltsovnik) is a pejorative Polish slang expression that originated during the Holocaust in Poland in World War II and refers to a person who blackmailed Jews who were in hiding, or who blackmailed Poles who aided Jews, during the German occupation.
Szmalcownik (; in English, also sometimes spelled shmaltsovnik) is a derogatory Polish slang term that emerged during World War II and refers to someone who extorted money or favors from Jews hiding from the Nazis or Poles assisting them.