black operation

• a variation of black op.
  black op

  noun

  Often black ops a secret mission or campaign carried out by a military, governmental, or other organization, typically one in which the organization conceals or denies its involvement.

More Suggestions

• black section
• cooperation
• laceration
• noncooperation
• unary operation
• blackbody radiation
• Mules operation
• dilaceration
• disoperation