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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.
by Malumteod March 07, 2015
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