Used in the place of someone’s name, indicating that the person is of little importance
Used in place of a person or thing when you are speaking generally
It can also be used as euphemism to describe an unpleasant person
Can be used in place of a swear word
I love how June is always telling us how she met so-and-so on her travels. Everyone knows that she is making it up.
Book club is mostly used for gossiping. Peter bought a new car, so-and-so had surgery on her face.
First my fridge packed up and then the so-and-so on my car breaks. It has really been a horrible week.
You are welcome to bring so-and-so to our party on Friday night. We don’t bother remembering their names anymore.
My ex-husband was a real so-and-so. I am glad that he is no longer part of my life.
My new boss is a real so-and-so. He is rude to everyone.
We really don’t like her. She is a mean little so-and-so.
There is no origin for this idiom
Common phrase that has a specific meaning.