rogue，hoodlum，immoral behaviour，hooliganism，blackguard；

[例句] 有些人指控税务稽查员使用了流氓手段。 Some people accuse the tax inspectors of bully-boy tactics.

[例句] 还有其他形式的民众骚乱，最出名的是足球流氓行为。 There are other forms of civil disorder — most notably, football hooliganism.

behave like a hoodlum [hooligan]，take libertes with women，act indecently ；

[例句] 那个团伙常常耍流氓。 The group have frequently used bully-boy tactics.

[例句] 我会成为独一无二的在疗养院耍流氓的人. I'll be the only person in the nursing home flirting.

[书] the common herd，the mob，riffraff ；

[例句] 大声叫嚷的群氓(多数是无业青年)肯定会做出很多违反行为来制造麻烦. Screaming mobs , mostly of jobless young men, will surely use any irregularities to make trouble.

punk，hooligan，rowdy ；

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