piehole       
noun [ C ] very informal US uk/ˈpaɪ.həʊl/ us/ˈpaɪ.hoʊl/ (UK cakehole)
 嘴,口
a person's mouth
  Everything that comes out of his piehole is a lie. 他一张嘴每句话都是骗人的。 
 Don't think that's a good idea? Then shut your piehole! 你不觉得这是个好主意对吧?那就闭嘴! 
 - More examples
 - Can you come back later? I’m stuffing my piehole right now.
 - If someone gives an opinion that you don't agree with, you tell them to shut their piehole.
 - I'm sure everyone would love it if you would shove a doughnut down your piehole.