Wiktionary
their butts
pron. (context colloquial the third person singular English) they.
Usage examples of "their butts".
They landed on their butts and slid the rest of the way to the bottom.
We're going to kick their butts and send them off howling for their dead.
After a few moments of intense discussion on the matter, and some desperate shoving, their mutual desire to save their butts drove them into close embrace and popped them through.
Enjoy standing around in a dress uniform while diplomats made decisions that eventually they'd have to risk their butts to enforce.