Wiktionary
pron. (context colloquial the first person singular English) I.
Usage examples of "my butt".
Meaning I've been here nearly forty years and if I were making real money or had anything to do with production they'd've fired my butt years ago.
You know, I could work my butt off, cleaning my room for him, making it shipshape, and he would focus on the one spot of dust I'd missed.
Why would I have worked my butt off for this firm all these years when I could have taken a top position in the Templeton organization at any time?
Time for me to park my butt on your doorstep and explain why I did what I did.
I threw myself backward into the floor and was drawing the Browning before my butt hit the floor.
He moved one hand to my butt, supporting all my weight on one hand, while he moved the other hand between us.
If I'd wanted to sit on my butt and be bored, I would have stayed home on the estate.