A fork of Rural Dictionary
When a particular excuse is so convincing that you could use it 3 times without it losing it's credibility.
Mom: Why is there porn in our internet history? John: Sorry, mom, it was in a pop-up from another website. Mom: Oh ok then. Dad: Damn, son, that excuse wasn't just good. It was 3 good
Having sex with two members of the opposite sex.
This past weekend in Chicago I had a 3 way the good way with two exchange students from Sweden.