The word "piehole" is a slang term that refers to a person's mouth. It is often used in a playful or humorous way to tell someone to be quiet or stop talking. Full definition
May wan na shut your arrogant piehole before He comes back and sees you trying to speak for Him. (religion.blogs.cnn.com)
Somebody does up here in Alaska — product called «Yummie Chummies», made for dogs out of the leftovers of a fish long considered by the locals to be fit only for dogs, the «dog» or «Chum» salmon, now renamed the «Keta Salmon» to sell to human pieholes. (marksdailyapple.com)
Welcome to the great American tradition of putting your foot in your piehole... (religion.blogs.cnn.com)