When one usually talks from one's Vagina, hypothetically. Commonly the opposite of 'Trash Talking'. Vagitalk is more known as verbal discussion between two or more persons about a topic in particular in which others would refer to as soft-wording.
Person1 - " Don't make me kick you in the balls..."
Person2 - "Pfft, that's vagitalk compared to what I did to your bro"
Person3 - " it's true...but i didn't believe him!! "
Person1 - " What did he do...?"
Person3 - "...the world may never know..."
Person2 - " that's right, stfu
and start -- (insert sexual/racist/harassment joke here) "