coppy, n. — Green’s Dictionary of Slang

coppy n.

[cop n.¹ (1); note: orig. edn. of 1965 citation, For Love of Imabelle (1957) has copper]

a police officer.

1965		C. Himes Rage in Harlem (1969) 81: They done croaked a coppy.
1972		E. Shrake Strange Peaches 269: ‘What are you doing here [i.e. Dallas PD HQ]?’ said one. ‘You turned into a coppie?’.