When you have an orgy with one person from every ethnicity.
Kyle hosted a United Nations on the weekend.
In lieu of calling a woman a slut, she is called the United Nations or UN because at one time or another most nations have spent time in that chamber.
Jenny has really had sex with a lot of guys. She’s the United Nations!!
MUN abbreviation for Model United Nations, is an educational experience/simulation in which students learn about diplomacy, politics, world issues, international relations, and the United Nations. It is basically a smaller-scale version of the United Nations.
Model United Nations benefits the young who aspire to be great leaders.