hoople, n.¹ — Green’s Dictionary of Slang

hoople n.¹

[Du. hoepel, a hoop, orig. used in New York City]

(US Und.) a ring.

1928		J. O’Connor Broadway Racketeers 252: Hoop or Hoople — A finger ring.
1931		Irwin Amer. Tramp and Und. Sl. 103: Hoople. – A ring, more frequently used by pitchmen selling ‘slum.’.