Top Definition
A threesome between a hetrosexual couple and a third-party, where the third-party only ever interacts with one member of the couple who is of the same sex. Essentially giving one person in the partnership a bisexual experience.

Named after the character Ross Geller from from the sit-com 'Friends', when Ross proudly proclaims to Joey, that he had a threesome with his wife and her freind. However after additional discussion realises it wasn't much of a threesome at all as he didn't get to touch the other woman.

Barry and Julie, decide to have a Rossway with Julie's friend Claire. Barry doesn't get to (or isn't allowed to) "play" with Julie at all.
by Bucko_NZ August 19, 2007

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