Sentence:  Anything about the police sets them a talking at once. ... 'The blessed <WSD>crushers</WSD> are everywhere,' shouted one. 'I wish I'd been there to have had a shy at the eslops,' said another.  And then a man sung out: 'O, don't I like the Bobbys?' 
Meaning of the word marked with <WSD> tags:  A policeman.