Sentence:  The Bat—they called him the Bat.nb.... He'd never been in stir, the bulls had never mugged him, he didn't run with a <WSD>mob</WSD>, he played a lone hand, and fenced his stuff so that even the fence couldn't swear he knew his face. 
Meaning of the word marked with <WSD> tags:  The Mafia, or a similar group that engages in organized crime (preceded by "the").