What is Man Van?
1.
A minivan, usually older, but doesnt have to be that a teenager boy drives. A point of humor with his friends that have their own cars. Usually resulting in them questioning his sexual orientation or the size of his genitals.
The kind of car a 16/17 yr old guy drives if he doesnt have a car or he has to drive his moms because his older sister/brother is driving the "kids" car.
Random Words:
1. 
Mix this with water and presto!  You have yourself douche.  Can also be used as an insult.
My wife is cheap, so she buys douche powder...