Term used to call people 'foolish' or 'jerkface', however it's literal meaning is a penis with foreskin removed
Person 1: "Aww get outta here you shmuck!"
Person 2: "Uhh Person 1, you do know what that means, right?"
Person 1: "Jerkface?
Person 2: "No, it's a body part...that you don't have..."
shmucknoodle is used to express a slight dislike to someone or something when your angry. for example if someone calls you out or is bullying all you have to say is shmucknoodle they will be confused and probably wont know what to say back.