When a girl decides she's is done talking to whoever she is, in a rude way. Chances are it was a text conversation with her boyfriend or other guy and she was bitching him out.
Austin: I just dont get why you are reacting like this? it wasnt even a big deal.
Emily: ummm how about you dont talk to me like im stupid. k thanks
when someone tells you information that you really dont care about.
or when someone is giving you a big lecture when you do something bad and you reply with a K THANKS BYE
ex.
sam- "mark told me he is going to beat up jordan"
fred- K thnaks BYE!
ex.
teejaie- dude i just lipped off sam
dude- you really shouldent do that your going to make her hate you.
teejaie- k thanks bye..!!
(Pronounced "Kay-Thanks" - One word) Thanking someone for doing something that you aren't really giving them the option to do in the first place. This is always said in a sarcastic tone and there is usually a prolonged emphasis on the "s."
Honey, I know you have the flu, but please go outside and shovel the 7 feet of snow we just got last night. Kthanks.