Jawfaceing 

(verb) When someone is talking a lot and is getting on your nerves.

Your friend is continues to bug you about a lot of nothing
You respond "Yo man, quit your jawfaceing"

Jawfaceing by HaDawg August 22, 2009

jawjacking 

is when you are talking out of the side of your mouth. Meaning you aren't talking about anything of any importance or you are stunting.

Man don't listen to that braud she's jawjacking

jawjacking by Star.bee December 1, 2007