When I was a kid, we used to get three strikes before you were out...
BTW, my grandmother was Irish and let me tell you that woman could make a sailor blush. I couldn’t choose the clan I was born into but I did make the right choices for me. Let me assure you, despite grandma’s colourful vocabulary, no one ever took GOD’s name in vain.
I’m old and cranky and have to be careful around the grandkids about which words/phrases, intonation and level of speech, and physical gesters I might use in stressful (mine, not their) situations. I do try, but sometimes like most human beings, I slip in a new word or two. :)
I'm from an Irish family as well. I'll admit to a rather colorful vocabulary. It's real bad when others aren't around and I'm being frustrated at my work....or watching a sports event alone.
There are lines I don't cross. God doesn't have a last name. Grandma's ghost would haunt me for that one and get God to strike me with a lightning bolt. There's two four letter words I don't use. One begins with c and the other t. If word got out that I used that, my mom would drive out to my place and slap the side of the 30 something head over the ear asking "What the hell is the matter with you."