[wū hé zhī zhòng]
a motley crew (crowd); a disorderly crowd; a gathering of crowds; a crowd assembled like crows; a motley force that knows no discipline; sheep that have no shepherd; tag-rag and bobtail; mob; rabble; ragabash [riffraff]
These bandits are just a disorderly mob and will collapse at the first blow.
这些土匪是一群乌合之众， 不堪一击。