The third time a person has sex with two people at one time. That is, the third threesome. Analogous to golden birthday.

Any kind of threesome counts. Three girls, three guys, two girls and a guy, or two guys and a girl.
First, Dick slept with Jane and Sally. Then Dick slept with Jane and Tommy. Then, for his golden threesome, Dick slept with Angela and Tammy, successfully completing his golden threesome.

It may be many years before Dick pulls off a golden foursome.
by itsyallyall December 17, 2012
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