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1.
K3
The more relaxed version of X3, it's what follows X3 naturally. After the initial reaction to something it's what you can use to show you are just chillin'. It has a couple of variations like >K3 and K3~.

It is not to be confused with the KKK.
What's this? :3 (Curiosity)
Hmmm? =3 (Eagerness)
Lol wut X3 (Happily surprised)
Aaaaw, that's so sweet K3 (Playing it cool)
by Quakeulf April 28, 2008
 
2.
k3
a group of three bad asses that plan on making the world a "white man experience" basically that means shotguns, beer, and no laws to follow. In addition, there are no minorities to fuck everything up by selling drugs or planting curry farms. These three individuals are some of the most majestic mother fuckers you will ever lay your eyes on in your entire life.
the k3 will prevail
by shotguuuunnn February 09, 2013
 
3.
K3
It's a heart (<3). (used in games where you cannot type the < symbol)
In the game Asda Story, you can't type "<"
OMFG~! I K3 my new sword!
by Lehcar0 March 20, 2011