| blue wall of silence | |
noun | |
| the secrecy of police officers who lie or look the other way to protect other police officers; "the blue wall cracked when some officers refused to take part in the cover-up" |
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| a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison. |
| a fool or simpleton; ninny. |