k. 

The ultimate insult. If someone texts you this, they're pretty angry or they just don't like you.

Text Message -

Alex: You still coming tonight?
Jess: Sorry I'm going to the cinema with Brad now
Alex: k.

k. by AliceJones__ July 3, 2010

K. 

I don't wanna talk to you and I hate you

You: I'm sorry :'(
Me: K.

K. by iskate4fooood September 13, 2010

k. 

the ultimate response to someone you don't like or when you don't care what the person is saying.

You: Dude. Your fucking ugly. I don't see how anyone could have any interest in you at all!
Me: K.
You: ....

k. by #1 Twerk Bitch August 31, 2013

k. 

Quite literally a slap across the face.

Jesicca: Coming out tonight?
Charlotte: No, I can't arranged something else.
Jessica: k. -signs out.

k. by ambzzsimm December 9, 2010

k. 

If someone responds back to you with k. They are giving you attitude so that means fix what you did or hop off

Person 1- hey we still hanging out today?
Person 2- sorry I can't today
Person 1- k.

k. by lifesaver32699 April 12, 2014

k. 

you are done for

a: i’m not coming, i already have plans sorry!
b: k.

k. by waluigiissuperior March 20, 2019

k. 

Used by some people when they lose an argument.

Random Person: Dude u suck hard

Kaglins: your mom sucked me harder.

Random Person: At least I have a mom.

Kaglins: k.

k. by vintx March 15, 2018