a Thai dish composed of fried rice noodles with coconut milk. it is so foul that it is used to describe any disgusting thing, and is a less offensive substitute for words such as shit, bonch, mung, or jizz. unless of course you are talking to a thai person.
Mr. Nguyen: "My wife is making a hot batch of Mi Krop for tonight's dinner."
Random Thai boy: "Oh yeah, when's it gonna be done?"
Mr. Nguyen: "Whenever her period drops."