English Idiom - Pardon My French
Today's idiom is pardon my French. We say "Pardon my French" as a funny way to apologize for cursing or using profanity. It is also common to say excuse my French.
Back in the 1800s, the phrase was used when you actually used a French word or phrase in your speaking. You might say, "The film had a certain, je ne sais quoi." Then you'd say "Pardon my French," because it was a little rude to speak French in front of people who might not understand. Eventually French developed some negative connotations in English—sorry French speakers!—and the phrase came to be used with swear words.
Here are some examples!
Shit, I hit my head—Oops, pardon my French!
When John accidentally said a bad word, his wife told him, "John, don't curse in front of the children!" He replied, "Oh, I'm sorry, pardon my French!"
Excuse my French, but this movie sucks!