My parents were not afraid of a little profanity, but never the F word.
They absolutely meant business though.
Mom was the judge and jury.
Dad was the executioner.
I learned early on to make sure dad didn’t have to get involved in my discipline.
Lol. My Dad (when talking about more "proper" people) would say "_________ wouldn't say Shit if his mouth was full of it"!
My mother's self given nickname was "Mama Bitch". She even made it her damned license plate for a while.
When taking my younger kids to visit grandma I'd have to remind them "Just because you can hear it, doesn't mean you can say it".