Blatherskite

I don't know if I really need to explain these words beyond the above video clip. 

In case you don't yet understand, a blatherskite (blah-ther-skite) is a person who talks quickly, incessantly (constantly), and doesn't really say too awfully much. Also known as a chatterbox or jabbermouth, a blatherskite can be found in almost every group of friends, every classroom, and every job site. They are generally pleasant, but the volume of speech the spit out can sometimes cause you to crave a quiet, dark room.

If this happens, just look at your watch and explain that you forgot an appointment or curfew, and RUN. Do it kindly. 

Never be offensive or rude to a blatherskite. The very fact that they jabber so much to you is a compliment. They feel comfortable around you and are able to express themselves.