to call someone's phone uninentionally by sitting or pressing on your phone while it is in your pocket

He butt-dialed his boss and she overheard the whole conversation. 他不小心碰到按键而误拨了老板的电话，结果她听到了整个对话。

a phone call that someone makes unintentionally by sitting or pressing on their phone while it is in their pocket

Sorry, I didn't mean to call you - it was a butt-dial. 对不起，我不是要给你打电话——是不小心碰到误拨的。