The term 'dregs of society' is used to refer to the lowest members of a community, often those who are considered to be morally or socially unacceptable. The two crossword solutions for this term are 'SCUM' and 'RAFF, ' both of which are four-letter words. SCUM is a derogatory term used to describe someone who is considered to be worthless or contemptible, while RAFF is an archaic term meaning the lowest class of people. Together, these two words provide an accurate description of the dregs of society.