Man I skeeted magic sauce all over that ho!....or...Hey gurl u lookin a lil tense, y don't you let me give u a massage with my special Magic Sauce! or Yo I think dem mofos put some magic sauce on my burger da other nite
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.