The Pickle Chin, short for boy I'm really boutta get to yo pickle chin, is a meme sometimes used as either a joke, or an insult.
Joe: "Bob, I must inform you that I am at the stage where I am going to be arriving at your posterior which belongs to a person where the most southern part on their head looks similar to a cucumber that has been soaking in vinegar for an extensive amount of time, or, in layman's terms, a pickle. The entirety of your head also appears to be shaped like an egg, more specifically the egg of a chicken. It also, at the same time, happens to look like multiple vegetable that are considered "collared greens." I must also say that you have presumably not bathed or cleansed yourself in any way for quite a while, as being near you provides discomfort to my nose in the form of a smell, and you also have a large amount of dirt and dust on your body and clothes. Your hair also seems to be cut in the shape of a large sphere or ovoid, more commonly referred to as an afro. You also appear to have applied the popular beauty product known as lip gloss to your chin, making it shiny. With all that said, I arrive at the conclusion that due to all of your physical appearance, you are distasteful to the average eye, which happens to include my eye. To put it bluntly, boy I'm really boutta get to yo pickle chin ahh boy, egg head like collard greens head ass boy, oh hell nah boy yo dirt ahh boy stank ahh boy afro head ahh, lip gloss chin ahh boy ugly ahh boi."
Bob: "what in the name of kfc did you just say"
Joe: "The Pickle Chin, short for boy I'm really boutta get to yo pickle chin is a meme."