Wiktionary
his butt
pron. (context colloquial the third person singular English) he.
Usage examples of "his butt".
The man found himself off his butt and standing in front of us faster than he wanted to.
But he hadn't paid any attention to the peace-offering smile, instead erupting out of his car almost as soon as his butt hit the seat.
He lay back savouring the luxury for one brief moment then sat up straight with his butt on the front half of the seat cushion.
And after he figures out that you're ready and able to kick his butt, you turn and walk away.
He lifted his butt and pulled his boxers down, freeing his hard little cock.