K

More known to the younger generations, replying back to someone "K" is the texting, messaging, and internet equivalent of giving someone the middle finger, sent by someone who is displeased. Sassy, short, and not sweet

A term of acknowledgement especially without particular interest

People too lazy to spell "OK" use this letter instead.

Conversation over text or messaging

Friend: Hey, something really important came up and we'll have to reschedule our plans for tomorrow. I'm really sorry!

Friend 2: K