Rogets II: The New Thesaurus, Third Edition. 1995.
ragtag and bobtail
NOUN:
A group of persons regarded as the lowest class: dreg (often used in plural), lumpenproletariat, rabble, riffraff, trash. Slang :scum. Idioms: scum of the earth, tag and rag, the great unwashed. SeeOVER, RICH.