used to describe someone or something which renders others powerless; to make flaccid; some kind of mineral that makes Superman cry.
1. "What is wrong with you, man?" Sniffle."What do you mean, what's wrong with me?"-"Dont you get it?"-"She's my kryptonite." "Okay, Brian. That's enough. It's time to put away the ice cream and get out of that stupid Superman costume."