K4 

'K4's are very small, yellow, easily crushed pills that contain 4 milligrams of hydromorphone under the brand name DILAUDID. They are very valuable because the pills do not contain any crap, binder, or harmful filler ingredients. Everything in the pill is safe to inject directly into your veins. A crushed pill will even dissolve in cold water! Dilaudids allow uniquly fast and easy prep for injection. Despite the cost ~$20 each; this drug is extremly popular.
Dilaudid smack OxyContin endo Lortab hydro MDMA MORPHINE Methadone Xanax Soma eNod OP8 OPM THC Roxy fentanyl China White poppy ld50 EtOH 714 Tussionex

"Oh shit! The Mexicans are out of smack. We better get our asses to the projects and score some K4s"
"Well,..OK. Deal. One free rig for each K4 you buy"
"You think K4s are expensive now. 15 years ago they went for $40 a pop. No lie."
"Everybody told me not to, but I shot A K4 once. It was 11:30PM Dec. 1999. I mean the millennium only gonna come once. It was worth it. I didn't get hooked."

K4 by Sublimaze October 22, 2007

K4 

K4 is derived from the late 90's and is applied to someone whos left and right testicle hang lower/higher than the other.

MAN 1: Dude, I have this problem.
MAN 2: What is it?
MAN 1: One of my nuts hangs lower than the other, do I have a disease?
MAN 2: No, you just have K4.

K4 by That dude69 July 9, 2009

K4 

1:A loyal guy he’s very good to talk to , A guy who understands a girls feelings more so than her own. He can make anyone laugh and brighten someone's day by the smallest things. He is usually characterized by artistic abilities, being a nerd, and is incredibly smart. A k4 is the best guy to talk to because he will listen.
Be careful when you meet a k4 because he might steal your heart (for girls only)

2:the epitomy of Prince Charming
That guy just drew a master piece while listening to me talk about my feelings, he must be a K4

K4 by k4ski November 19, 2023

Luh k4 

An underground Atl rapper 12 years old affiliated with the group gang 13k in Atlanta,georgia

:this is luh k4

Luh k4 by Luh k4 November 20, 2023

K4L 

A Forward Assault pro clan. D3VA , M38BoNcUK and WOX1C created this clan. They are really good.

Gl K4L . #K4LTop

K4L by Prof. Dr. Forward Assault March 26, 2020

k4yfour 

Australian or New Zealand or somewhere around there man, who streams minecraft speed running.

Did you watch k4yfour yesterday? He chocked another sub 15!!

k4yfour by Tyler Blevens March 24, 2021

K4F 

Kill 4 family

I’ll kill 4 family K4F

K4F by Cuzdw August 28, 2019