A professional "middle-ground seeker" who display his/her cute legs during yackety-yack sessions intended to settle disagreements, create mutually-palatable business-deals, etc.
Two well-known examples of kneegotiators were Daisy Duke and Pocahontas, although in both of their cases, they went a lot farther than just having "petite" pant-legs --- Catherine Bach's character wore her famous nearly-butt-baring cut-offs while persuading the Hazzard-County officials to go easier on her uncle and cousins, and the historic Native-beauty chick would actually show up stark-naked when she went to assist the colonists or hold diplomatic talks with them.
when you're holding up your phone and making faces at it, as though you are taking a selfie, but you're really taking a picture of the person across from you or the wall or anything else that seems interesting but you don't want to be caught dead taking a picture of.
This action is often made more convincing by wiggling the eyebrows or opening the mouth, to pretend you're trying to get a Snapchat filter to work.
FRIEND A: "Did you just take a stealthie of me?"
FRIEND B (turning phone around): "no I was just using snapchat's new filter, see?"