douche + asshole. thereby, making the person in question, more of a douche and an asshole at the same time. generally used with people who just drive you crazy and calling them anything else just seems too little. it was invented for frank lampard.
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