The term "swinish multitudes" is a derogatory phrase used to refer to a large group of people who are perceived as lacking in intelligence and good behavior. While this phrase is not commonly used in modern language, there are many synonyms that can be used to communicate a similar sentiment. Some alternatives to "swinish multitudes" include "mob", "rabble", "plebs", "peasantry", "hoi polloi", "masses", "crowd", and "inferior class". However, it is important to recognize the negative connotations associated with using such terms and instead strive to communicate respectfully and accurately.