Common Meanings
1
méng氓
In ancient times, a term referring to common people, especially outsiders or migrants; populace.
那片土地上曾住着一群勤劳的群氓
That land was once inhabited by a diligent populace.
2
máng氓
When pronounced 'máng', '氓' is used in the compound '流氓' (liúmáng), which refers to a hoodlum, ruffian, or scoundrel.
那个流氓被警察抓走了。
That hoodlum was arrested by the police.