my ass
1
used to show one's disbelief over something that was just said
The origin of the idiom "my ass" is unclear, but it has been around for a while. It is a casual and straightforward way that people use to say they do not believe something or disagree with it. This expression is often used in informal conversations and can be offensive at times.
- You think your job is tough work?Tough work, my ass!My job is the tough one.
- You're going to win the lottery tomorrow?My ass!
- Running a marathon without training?My ass you did that!
- Your cooking is that incredible?My ass it is.