.k. 

an abrupt, annoyed version of "k".

While "k" sounds like "kay"
".k." is quick and snappy and sounds almost like "cape".

When someone says something annoying AF and you just can't hide your displeasure, ".k." will suffice.

.k. by BiscuitNeck July 4, 2020

k 

1. A short version of "okay"

2. A very rude, hateful way to agree or acknowledge.

A: Wow, you really hurt my feelings...

B: k

A: ...I'm gonna go now...

B: k

A: I'm sorry :'[

B: k

k by AccurateSabotage March 14, 2011

k 

usually used when someone is done or annoyed with the conversation or person they’re texing

toby: sorry i canceled our date i really wanted to go to the arcade
olivia: k.

k by libby cardinal March 13, 2019

K 

The letter people text you when they don't want to talk to you anymore.

Person 1: Cool, I'll talk to you tomorrow then?
Person 2: K

K by Skitzophrenic December 11, 2012

/k/ 

The "Weapons" board of 4chan.
A regular poster on /k/ is usually referred to as a /k/ommando, and discussions usually involve modern weaponry, but this is by no means exclusive.
Like most other boards on the site, it is primarily likened to a river of shit with gold nuggets on the bottom. Whether or not it is worth panning is entirely up to you.

/k/ - a magical place

/k/ by Zolotros July 30, 2012

K 

The text you receive from your girlfriend, really meaning "fuck you"

"babe im sorry" -boy
"k" -girl

K by BoobMaster95 May 20, 2011

k 

Exactly what you do NOT reply to a long, heartfelt message sent over ANYTHING.

Maurice: *reads heartfelt message from girlfriend, replies k*
Girlfriend: *texting* Go fuck yourself.

k by Intelligence001 June 14, 2016