Top Definition
A very attractive young woman who is wanted by many men, whereby the chances of being with said girl are very slim.
That chick is such a killboy...
by 7th Rifter December 01, 2007
4 Words related to killboy
A masked superhero who prowles the streets of Taunton searching for crime to deminish. Sidekick Spandex Boy Jvstice and Lummox X
Killboy's dog gave me a blowjob
by Killboy November 06, 2003

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