Sentence:  Teresa broke out in laughter. “Dang, I sound like I'm talking to my man.” “I tried your cell phone, but you didn't answer.” “I left it at home, Friday. My <WSD>bad</WSD>.” “Yeah, your <WSD>bad</WSD>.” I laughed. “Really, I'm sorry. It won't happen again.wikipedia 
Meaning of the word marked with <WSD> tags:  Error, mistake.