Zip's

Zips is a slang term in the United States that was especially in use in the mid-20th century. It was often used as a derogatory slur by Italian-American mobsters in reference to newer immigrant Sicilian mafiosi. The mobsters in the US were said to have difficulty understanding the Sicilian dialects of the new immigrants, in which words appeared to "zip" by. Other theories include pejorative uses,... (Wikipedia)