liberty boy
/ˈlɪbəti bɔɪ/noun
1Chiefly with capital initial in the first element. A member of a disorderly gang of weavers from the Coombe area of Dublin. Now historical.
2Chiefly with capital initials. A supporter of the American cause prior to and during the American War of Independence (1775–83). Now historical.
Origin
Mid 18th century. From liberty + boy.