First used on the hit TV show How I Met Your Mother by Barney Stinson to describe Marshall Eriksen's homely assistant.
Marshall: Hey, that's Iris, my new assistant. And yes, she is a little plain, but I'm married, so that's good.
Douche #2 - Gross dude, I would not bang her unless my parents wouldn't let me leave the dinner table.
Douche #1 - LOL!