buckeen
a poor young man of the lower Anglo-Irish gentry who aspires to the habits and dress of the wealthy.
historical
Probably no other country could produce such a degraded type as the squireen or buckeen, the drunken, gambling, profligate descendant of the Cromwellian or Williamite settler.
Where it comes from
From Irish boicín, the diminutive of boc. Equivalent to buck + -een.
Adapted from the Wiktionary entry buckeen (CC BY-SA 4.0).