or, after stubbing one's toe,
'OW! FUCK! JEEESUS! I'm sorry ... excuse my French.'
The term "French" has many other sexual meanings. French culture is a common sex worker euphemism for oral sex, a French lesson is a visit to a prostitute, French kissing is a more vulgar kind of kissing. They used to call porn pictures "French prints" and being Frenchified was catching syphilis.
Reference: The Slanguage of Sex by Brigid McConville & John Shearlaw, 1985.
The Goth narrowed her eyes, "Maybe the paper boy was right, we will conquer the world with darkness some day."