n.; An erection aroused by violence
Clubbing baby seals gives me such a murder boner!
door D. Pratt 15 november 2006
On a male, the physical effect of being aroused at the thought of extinguishing a human life.
An old lady crossed the street in front of my car and I got a murderboner at the thought of flooring it.
door Danny Valentine 11 december 2010