Wordfuse (Excessive Words Edition)

I like to make up words.

(noun) PS (PostScript) + ness = an occasionally sarcastic but mostly polite word/euphemism used to describe compulsive talkers, (myself included) who continue blathering on much longer than is necessary (post script after post script after...) but due to the ideal combination of speaker and listener the experience is mutually rewarding aka a total vibe. 

Think of those fun people with whom you just click like long lost friends but after 35 minutes of blathering in the grocery store you missed a meeting, an appointment, your kids' swim meet, your job, your newborn's birth, etc. On the flipside are those compulsive talkers with an appalling lack of self-awareness about their annoying verbosity aka talkaholism. 

Dear friends, how do you halt a talkaholic?