Origin (A dip in the lip is a phrase used by Alabama teens who don't dip but make jokes about dipping) basically calling someone your best friend that you can't live without as in rednecks who can't live without their dip in their lip

when you put any number of pinches of chewing tobacco in your bottom lip and the visibility of it

A large lower lip that makes it appear as if a person constantly has a dip in.

When you stick your finger in your butt after a shart and then swipe your finger across someone's lip unexpectedly