"as soon as mabel picked up the phone, ned's velvety voice greeted her: "you up for a little r.a.i. tonight, baby?""
(abbreviation) receptive anal intercourse
""as soon as mabel picked up the phone, ned's velvety voice greeted her: "you up for a little r.a.i. tonight, baby?""" What is the definition of "r.a.i."?