You are about to get destroyed physically, mentally, and spiritaully. Generally if this phrase is bellowed out it means the bellower is about to engage in a mass slaughter with absolutly no care for their own safety. Expect no quarter given. Although a relitivly rare act, certain social pressures, neurological ihibitors, or defeat in a video game can cause this.
Vavey: Owned you again!
Dave: Now witness the firepower of this fully ARMED and OPERATIONAL battle station!
*Gore everywhere, house destroyed along with neighboring countries