murder boner 

n.; An erection aroused by violence

Clubbing baby seals gives me such a murder boner!

murder boner by D. Pratt November 15, 2006

murder boner 

Etymology of the word Murderboner: The name dates back to circa 800 AD when hoards of Vikings pillaged new lands. Observers of Viking raids told huge erections achieved by the warriors after killing a victim.

Alternative meaning: what your dick looks like after having sex with a girl on her period.

As he pulls out... he looks down and sees blood, SHIT Murder boner.

murder boner by Tonto_89 September 18, 2016

murder-boner

When you're jonesing to see a gruesome death on film, you can be said to have a murder-boner.

"What do you wanna watch? I have such a murder-boner."
"Silence of the Lambs always cures my murder-boner."

murder-boner by Seeing Double November 10, 2013

murderboner 

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.

murderboner by Danny Valentine December 12, 2010

Murderbone 

When you intend to murder someone, but end up boning them instead.

(Inspired by events from the end of Dexter S07E06)

"Wow, I can't believe Dexter just murderboned Hanna."

"Yeah, that's a classic murderbone."

Murderbone by DoktorZaius November 5, 2012