How do you say shut the f up in french? Because the person I am talking to knows no English and he is being an a.. h0le

Lol, you can just use the translator so you can know how to say it right!

Ferme ta gueule…………………

It depends : )
if the narrator participates in the story (it’s a character of the story) then yes.
but if the narrator does’nt participate in the story (the narrator does not have a character) then no.

This is not french =_=