keystone cop
📖 Definitions
noun
An incompetent bungling person, especially a police officer.
💬 Usage Examples
“The parents of Madeleine McCann have been declared suspects by police in Portugal. Many are now referring to the case as a travesty as these Keystone cops have now played a what appears to be desperate move to try and save face.” Lynda Johnson; Madeleine McCann Parents Shocked; The National Ledger (Phoenix, Arizona); Sep 8, 2007.