a lesser known branch of mathematics that studies douchebags. Douchenometry deals with the relationship between the modern day douchebag and doucheassery.
Douchenometry should be a mandatory prerequisite class prior to working at any Ed Hardy clothing store.
sample theories
1. douchebagA + douchebagB = 2 too many douchebags in one area
2. The shortest distance between two douchebags is always the other direction
A car that has been modified with a loud stereo system, loud muffler, and tinted windows. The car will also have lots of stickers such as Monster Energy stickers. The owners dress like real douches and tend to enjoy revving these engines at all hours of the day and night.
A common misspelling of the word douchenozzle; the misspelling became the norm at a BBS about TV commercials we all hate; it then became rather commonplace.
Dave is such a fucking douchenoozle for stuffing a roll of paper towelling and three boxes of tampons down our toliet bowl.