P.I.X.Y.: Person Intended for Xenocide and Yelling  :trust:   

Some others I tried out  :pop:
S.A.P.D.: Synthetic Android Programmed for Destruction    

A.R.P.D.: Artificial Robotic Peacekeeping Device ... awesome  

F.B.I.: Functional Biomechanical Individual  
A.R.G.O.N.A.T.H.: Artificial Robotic Guardian Optimized for Nocturnal Assassination and Thorough Harm