stone cold killer 

The guy(s) who really killed JFK.

David Yaras, Chicago Outfit

stone cold killer by rondh69 November 2, 2003

killer kiddies 

A child under the age of 12 who eats children in their sleep.

6 year old Danny says "Mommy check my closet for fother muckin killer kiddies! Yesterday Manny lost his middle leg!"

killer kiddies by John Dopafine April 14, 2007

Killer w5

A bad azz mutha fucka you will ever come across.

Omfg that guy Killer w5 killed me with a fork right after we fucked.

Killer w5 by Warren A February 8, 2009

Party Killer

beer pong.

guy1- "yo all they did was play beer pong the whole night"
guy2- " ugh party killer"

Party Killer by Illmatic playa May 28, 2009

411 Killer 

Killer based in the Plano, Texas region. Killer often comes at night and is very sneaky and painful with deaths. He was last seen in Murphy, Texas

Scream, 411 Killer

411 Killer by Victim1024302 April 30, 2011

kitten killer 

a girl who masturbates alot.

God kills a kitten everytime u touch yourself you kitten killer hoe.

kitten killer by ez4shez February 24, 2004

killer 

A person who kills the flow or vibe of a moment or just messes up the situation by coming in when not wanted or when they say or do something that is unexpected and interrupts the current trend of the moment...usually irritating the people or environment around them.

"This fool killed it by coming to the party."

"I was on the last level of super mario bros and my cousin killed it by stepping on the f'n cable."

"Edgar's new name is killer, because everytime we go out with the ladies this fool has to kill it and scare them away."

killer by Edgar E November 6, 2007