Green’s Dictionary of Slang

(Irish) a gaoler, a policeman.

c.1790		‘De Kilmainham Minit’ in Luke Caffrey’s Gost 5: For he was de smart on de Gap, / He boozl’d de Bull dog and pinners.
c.1790		‘Luke Caffrey’s Ghost’ in Chap Book Songs 5: Thro’ de key hole we peep’d at de pinners, / Den out of de window we run.