The belief that in a relationship, you'll never get 100% of what you want, so at most you get 80%. But some other person may come along and have that missing 20% you don't have. Some folks fall for the 20% just to realize they should've stayed for their original 80%. C/O Tyler Perry's "Why Did I Get Married?"
"Damn, my co-worker is so HOT and incredibly funny!"
"Think about the 80/20 rule, Becky. Think about it."
"Dawg! She is baaaad...34/22/36. Damn i would so hit that..."
"Whoa man; 80/20 rule dawg. Lisa is a good wife..."