(EN-lerdy) a pretty girl with a HUGE vagina. Preferably named casey or amy. It could also mean that your vagina/penis feels like it is going to burst open and fall of after sex. It should be sensational.
Person 1: “Oh, my nlerdie just bursted…feels gooooood!”
Person 2: “Casey is a nlerdie!”
Person 3: “I wanna’ get me some nlerdie!”