Okay. Here are my personal favorite. I am ex-military, so I had a real funky, nasty, potty mouth. I had to develop unique sub words too, now that I am a Mommy.
Instead of shut the **** up, use "Shut the front door."
Instead of ahhh, ****, use "ahhh shuggy duggy quack quack."
Instead of *****, use "biscuiteater."
When you're really angry, yell "Oh pinto beans."
Instead of what the ****!?!? Simply state, "What the duck?"
Instead of piss, state "pickled pigs feet!"
Hope these help!