To get it you must go to a cemetery with very liberal security and a buddy you trust enough to commit breaking and entering with. You will also need said buddy to help you dig up the grave. Once you've hit pay dirt and found the corpse you put your lips around the vagina of the dead woman and have your buddy jump off a tombstone and onto the corpse's stomach and wait for the mung to splash up into your mouth.
Later, programmers told new guys it stood for "Mung Until no Good", a recursive loop, and watched their heads explode trying to figure it out...
Speaking as a former paramedic, it has NOTHING to do with dead or pregnant fluids.
<Programmer 2> - Nope, It's Mung, Smith got to it first.
<Programmer 1> - Damn.
The mung bean is the seed of Vigna radiata which is native to India. Mung beans are commonly used in Chinese cooking. Germinated mung bean sprouts (usually sold simply as 'bean sprouts') are stir fried (usually with ingredients such as garlic, ginger, spring onions or salted fish pieces to add taste) as a vegetable accompaniment to a meal. Uncooked bean sprouts are used in filling for Vietnamese spring rolls. Mung beans are also used to make a sweet soup, served either warm or chilled.