Offscum is a derogatory term used to refer to someone who is considered the lowest of the low. The word has its roots in the combination of the words "off" and "scum," which together express disdain and contempt towards a person or group of people. While derogatory terminology is not ideal, sometimes it's necessary to address difficult topics. Some synonyms for offscum include low-life, scumbag, bottom-feeder, riff-raff and trash. These words are often used to describe individuals who engage in immoral, illegal or unethical behavior. While it's essential to use respectful language, sometimes it is necessary to use these words to express the severity of the situation.