bye then 

Commonly used as an expression of distaste at another person. Typically said to yourself when someone hangs up on you prematurely or walks off mid conversation.

"Oh, bye then"

People who use bye then in normal conversation are often seen as actively aggressive individuals and rude to others.

Oh, bye then

bye then by Nosybarker October 26, 2015

Ok bye then. 

Sarcastic way of texting a goodbye except the person does not actually mean "goodbye", they mean "why haven't you responded already" or "stop what you are doing and respond"
Used when the person wants more attention

*Boy leaves text on read for an hour *
Girl: "Ok bye then."
Boy: "bye!"
Girl: "smh dude get a clue"

Ok bye then. by Unlimitedbreadsticks October 30, 2017

Byethena 

The act in which somebody abruptly and unexpectedly says 'bye' or otherwise ends a conversation in the middle of talking.

The word is an amalgamation of 'Bye' and 'Athena' as clearly anybody who ends a conversation so suddenly must have far more important matters to attend to that the very wisdom of Athena herself couldn't persuade them otherwise.

Person 1: Did you have a good time last night?
Person 2: Yeah it was pretty cool, fancy going to town again tonight?
Person 1: Sure I'll..
Person 2: ttyl sorry, bye

Person 1: Damn, she pulled a byethena / Damn, she is such a byethena.

Byethena by Malumteod March 7, 2015