I do have to say, i'm a realllly bad mom then!!
I don't think i ever tried to substitute, just ran outside n screamed profanities at the top of my lungs, but now, my kids are much older and know better....so mom is back to talkin like a natural born sailor...
HOWEVER, I have to once again, tone it down (like get my running shoes back out) because we do have a new baby comin in a couple of months.
I know my mom used to say "razzmafraz" n when i asked her wtf? she said it covered any bad word any adult could ever say to express what they were feeling at that precise moment!!! LOL