Green’s Dictionary of Slang

(US) the buttocks or rear of anything.

1938		J.E. Reinecke Hawaiian Loanwords 26: Okole. . . 1. Arse, in the sense of either anus or buttocks, or both. 2. Of inanimate things, the rear or bottom end [DARE].
1965		J. Shirota Lucky Come Hawaii 242: Aw-w, kiss my okole.
1978		US Congress Select Committee on Indian Affairs 487: Eighty, 90 years go by, and you are still there sitting on your okole trying to figure out where did everybody go?
1984		W.D. Beamer Talking Story with Nona Beamer 12: As the rowboats neared the shallow waters, the men untied the blindfolds and hit the pipi (cows) on their broad ’okole (backsides).
1999		J.F. McGrady Sailing the Dream 309: ‘Okole maluna...’ our kanaka bartender interrupted [...] ‘That means “bottoms up!”’.
2005		M.A. Herr Kaua’i Obake Bar 55: Is okay, he just jealous cuz he got such a skinny okole. He got no padding like you.