This
database is a comprehensive collection of all the American idioms and slang available.
American Idioms are many and varied. We hope you enjoy our collection. We are adding more all the time.
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pledge to tell the truth about something (in a court of law someone may swear to tell the truth by placing his or her hand on a bible or other religious text)
The man swore on a stack of bibles that he had never seen the accused criminal before.
Don't even think about going into Chicago's housing projects unless you are armed to the teeth. This is a pirate phrase originating in Port Royal Jamaica in the 1600's. Having only single shot black powder weapons and cutlesses, they would carry many of these weapons at once to keep up the fight. In addition they carried a knife in their teeth for maximum arms capability.