an impolite way of describing people from a low social class, especially people who behave badly.

We don't want drug addicts and other riff-raff living near us.

• come within a whisker of
• come within a whisker of doing something
• come within a whisker of something
• come with the territory
• comings and goings
• commit something to memory
• commit to memory
• commit to memory something
• common ground
• common-or-garden
• common touch
• compare apples and oranges
• compare notes
• conk out
• connect the dots
• contradiction in terms
• contrary to popular belief
• contrary to popular opinion
• conventional wisdom
• conversation piece
• cook goose
• cookie-cutter
• cook someone's goose
• cook the books
• cook up