Sentence:  The AIF's bad characters became transmuted in popular memory into at worst merely mischievous larrikins. Since <WSD>larrikinism</WSD> was a common response of young Australian men to life, let alone war, the image has been easy to accept. But as we have seen, the AIF's behaviour went beyond mere <WSD>larrikinism</WSD>, and it seems time to acknowledge that fact. 
Meaning of the word marked with <WSD> tags:  Behaviour that is rebellious against and contemptuous of authority and convention.