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1.
murdergun= stronger than a gun with a knife attached to it with a porcupine with aids attached to that...
i will kill you in the face, with a murdergun.. perhaps even with murderbullets
by boodism December 06, 2011
 
2.
Any firearm created with the specific purpose of harming human beings.
"If anybody steps on my property, I am obliged to shoot them with my murder gun because I imagine they intend to kill me no matter what they say or do," said Billy Joe Bob Ledbetter.
by Charles Dunbar December 19, 2012