When someone begins talking while you are already talking and interrupts you. The word can also be applied in situations where people are not supposed to talk i.e at an inappropriate
time, during a moment of
silence, or even during a movie.
The phrase comes from "jaywalking" when people who cross the street when they are not supposed to and interrupt the flow of
traffic.
1. Dude would you quit jaytalking, I'm trying to tell
a joke.
2. That
guys a total jaytalker, he interrupts me every
couple seconds.