Top Definition
When someone has hooked up with every single sibling of the same gender but one, he/she is not allowed to hook up with the remaining sibling.
Hey, did Ross sleep with Sally when he was back in Iowa?

No, she wanted to but he couldn't do it - the Saving Private Ryan Rule, you know? He's already hooked up with Jane and Samantha.

Oh, right.
by Get.Big. August 07, 2009
5 Words related to Saving Private Ryan Rule

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