A very close friend that you trust
J1 is my Killy you know, known man from young still
by Ggfb June 21, 2020
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Killy is someone who you are close to and someone you trust

It is British slang used mostly is south london.
Speaker1: s1 is my guyyyyy
Speaker2:yeah man he is my killy still

Speaker1: yeahhh
by U scrummed it June 30, 2022
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Noun. Killy is a shortened and more hip version of “killer.” Here, killer is used to refer to your badass friend.
Eg 1. What’s up my killy?

Eg 2. Conzi: yo bro

Donk: Yh my killy
by ConziIsUnBelievable November 9, 2021
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A feeling of wanting to kill multiple people for being shitbags, but knowing you can't and won't do it.
I shouldn't leave the house today, cause I'm feeling pretty Killy
by Blondegirl1301 November 25, 2019
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Nick name or character name, Killy might be used as a intimidating name
guess what happened? what

Killy just folded everyone on yubo
by masi roof May 16, 2022
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A nickname for Philadelphia, a city with roughly 1 murder a day.
Please don't send me to Killy, I don't want to die!
by Alaeron March 23, 2009
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