An expression of disbelief or skepticism in the south, usually used by "grandmamie" when you talk about your new technology, your unkle when you talk about how tough you are or your girlfriend when you talk about how her eyes shine in the special light from the fishin' lantern (the latter is only a female tactic called 'fishing for compliments,' since she knows just how much discount glitter she used to get you to say that, and by no means should you take it seriously and sway from the original statement)
"I'm gonna whip your stinkin' butt"
"P'saw, son, you need a ladder?"
"I love the way your skin shines like the fish scales!"
"Oh, P'saw, you're just saying that tee hee"