The act of faking an orgasm by moaning and then urinating in your partner's ass. Thus creating a nasty, disgusting brown rain to spray out of you partners asshole as you pull your dick out, resembling the weather in Oregon.
Had to put my rain gear on to fuck that chick from the bar last night, Gave her the old Oregonian Orgasm!
by "Too Fat & Lil Furious" December 27, 2021